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Experienced and professional animal trainer provide their insights in answering this question :
A. Without knowing the nature of these lumps it is very difficult to discuss this further. Small needle or biopsy samples will help to identify the nature of these lumps and treatment options

How to Identify Common Pet Problems ?

Our sources include academic articles, blog posts, and personal essays from experienced pet care professionals :

Mast cell tumors are quite serious when identified in dogs. If untreated they can cause anaphylactic shock or if they progress into a more aggressive form they can metastasize and ultimately lead to death.
Many of you with older dogs will notice soft lumps or growths developing and might wonder whether or not these could be serious. While there are a few much more serious growths which can masquerade as lipomas (meaning they feel and look similar from the outside), lipomas themselves are not usually problematic.
SCCs can be reddened and slightly raised, but do not often have a smooth, rounded shape like other tumors. Sometimes they can also be crusted, scaly, and plaque-like in appearance. And since SCCs are malignant, they can occasionally spread to local lymph nodes or to other organs like the lungs.
The vast majority cause little concern, however those that continue to grow can cause problems, like restricting movement or breathing because of the lump`s size, or your dog keeps scratching them because they`re irritating. If benign lumps are causing problems, removal should be considered.
High Grade Mast Cell Tumors

These tumors share a universally bad prognosis with survival times of less than 4 months. They behave aggressively and require more aggressive therapy.

With surgery alone, the median survival (50% alive) is 6 months. With surgery followed by chemotherapy, the median survival increases to 12 months. In case of incompletely excised grade III tumors, we recommend either a second surgery or radiation therapy.
Lipomas or fatty lumps are perhaps the most common in middle-aged and older dogs. These harmless lumps tend to be soft, rounded and made up of fat cells. They grow very slowly, have no impact on overall health, and rarely spread. However, they can grow very big and overweight dogs are more susceptible to them.
Interdigital cysts are large bumps, or nodules, between a dog`s toes. They can also be called interdigital furuncles, follicular pododermatitis, or podofurunculosis. Interdigital cysts usually appear as red nodules filled with blood and/or pus. They are most commonly found on the front paws.
One of the best ways to identify a potentially cancerous lump is to evaluate how that tumor feels when touched. Compared to the soft, fatty characteristics of a lipoma, a cancerous lump will be harder and firm to the touch, appearing as a hard immovable lump on your dog.
Not all tumors in dogs and cats are cancerous, by any means. Older dogs are especially prone to developing fatty tumors of the skin, many of which can become quite large. Benign tumors often develop in dogs from the oil-producing glands of the skin.
They may grow quickly, over the course of a few weeks. More commonly they grow slowly over months or years. In advanced cases, the skin overlying the tumor can ulcerate or break open. This leaves dogs susceptible to pain and infection.
Mast cell tumor (MCT), also called mastocytoma, is a common skin tumor in dogs. The mast cell tumor is the most frequently diagnosed malignant skin cancer in dogs. Dogs are diagnosed at an average of 8 years old, although puppies as young as 4 months may be affected.
Location – Tumors in the mucosal regions have a worse prognosis. Evidence of metastatic disease – dogs with systemic spread will not live as long as dogs with localized disease. Evidence of systemic illness – dogs facing complications of their disease, or those that feel unwell may not survive as long.
Their symptoms will rarely prove fatal, but their lives will be long and miserable, and they may end by nearly exhausting their families and friends.
The survival of mast cells is dependent on the presence of continued expression of SCF by stromal cells within the tissues. Although SCF plays a major role in supporting the survival of mast cells, the mechanisms by which this occurs are only partially understood.
It depends on how aggressive or advanced the particular cancer is. By the time it`s detected, some dogs will live weeks to months, while others will live for years. Lymphoma patients, for instance, can live several years.
In dogs, the most common type of malignant skin cancer is a mast cell tumor. These tumors are superficial lumps that can be painful. They often swell, frequently bleed and then scab over, only to bleed again a few days later. They should not be squeezed by the owner, as squeezing can make them swell even more.
Infections or foreign bodies can hinder a dog`s mobility, but tumors can grow on dogs` paws, too — including on or in between the toes.
Cancer occurs more frequently in older humans and animals. While we do not know the exact causes of cancer in either humans or animals, it is possible that the weakening of the immune system due to age plays a role in the body`s ability to control mutated cells that could become malignant.
As dogs age, the normal cellular regeneration process changes, causing certain skin cells to grow at a rapid rate. This unusual growth rate often leads to benign skin growths that resemble warts.
Slowed respiration. Inability to get comfortable. A desire to be closer to you or a desire to be alone (this can depend upon the dog, but will present as being an unusual need or behavior) Loss of consciousness.
What is a lick granuloma? A lick granuloma, also known as acral lick dermatitis, occurs when a dog obsessively licks at an area, often on a lower limb, most commonly the wrist or carpal joint of the front limb. These dogs find a spot to lick and start a cycle of self-trauma, inflammation, and infection.
They rarely cause discomfort unless they are large.” They rarely cause discomfort unless they are large. Ulceration and bleeding are rare but large lipomas may necrose (die), causing yellow discoloration of the fat with, in the case of very large ones, toxic effects to make the animal unwell.
Found in the foot pads of the dog, corns are often seen as a circular area or `dot` in the base of the pad.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Q. How do I determine how much my overweight pet should weigh?
ANSWER : A. There are many tools to determine overweight and obesity levels in pets. A new tool, morphometric measurements and body fat index, are available to accurately determine a pet’s ideal weight; this will allow an accurate determination of the amount of food a pet should receive to achieve weight loss. Feeding the correct amount will lead to greater weight loss success.

There are many weight loss food options to help pets reach their ideal weight. Your veterinarian can help make a ideal weight recommendation. Here are some tips to help your dog lose weight in a healthy and safe way:

1. Diet: Providing a healthy and well balanced diet is essential to your pet’s overall health. Finding the right food for your dog can be a challenging process. For those overweight animals many commercial dog companies offer weight loss diets, but it is important to evaluate food labels for adequate nutritional content.

You want to ensure you are not missing other essential vitamin or mineral content. Volume of food is also important and the amount of food that works for one breed of dog may not be the same for another breed of dog. Portion control as opposed to free-choice feeding can help your dog to drop a few unnecessary pounds.

There are also prescription weight loss foods designed by veterinary nutritionists, such as Hill’s r/d (http://bit.ly/1AoENSd). Some pet owners find that home cooking is the best option for helping to provide a well-balanced and realistic diet plan. There are websites such as balanceit.com that offers recipes to fit your dog’s specific needs. Consulting with your veterinarian or a veterinary nutritionist to find the appropriate diet is a great way to help your dog be as healthy as possible.

2. Exercise: Another great tactic for weight loss for your dog is exercise. Whether this is through running, walking or playing with a favorite toy all of these are wonderful types of exercise to help keep your dog at a lean and healthy weight.

For those pet owners with busy schedules utilizing professional dog walking services or playtime through dog daycare services is another option. It has been shown that those pet owners that exercise regularly with their pets generally live a healthier lifestyle.

3. Physical therapy: As animals age pet owners offer encounter their favorite canine having more difficulty walking and have a dwindling desire to play with toys. Physical therapy, specifically hydrotherapy is a wonderful way to help older and arthritic animals gain more mobility and lose weight. Hydrotherapy has been proven to have several therapeutic effects on the body including, muscle strengthening, relief of swelling, decreased joint pain, less stiffness in limbs, improved circulation, weight loss, and increased tissue healing to name a few. For more information on the benefits of hydrotherapy:
http://bit.ly/1w1qqoy

4. Veterinary visit and blood work: Weight gain can also be related to underlying health concerns such as hypothyroidism or other endocrine disorders. Scheduling a veterinary evaluation and routine blood work can be another important component in increasing the longevity of your dog’s life. Conditions such as hypothyroidism that predispose dogs to gain weight can be treated with a daily medication to improve hormonal balance. If feel that your dog is unnecessarily overweight there can be an underlying health condition that needs to be addressed.

5. Healthy treats: Pet owners love the chance to reward their favorite canine companion with treats and most dogs jump at the chance to consume these delicious products. The problem is many treats, which can include commercial dog treats or table scrapes can add many unnecessary calories to your dog’s daily intake. Reading labels and making note of the calories in these treats is an important component of understanding your dog’s overall health. Treats should not exceed more than 10 percent of your pet’s daily calories. There are healthier treats that can be offered to your pet to keep calories lower yet provide a fuller sensation. A pet owner can add steamed or pureed vegetables, such as carrots, green beans or sweet potato to add more fiber and thus a fuller feeling for your dog.

Q. Whenever I take my dog on walks he always barks at people and others dogs in my neighborhood. What should I do to resolve the problem
ANSWER : A. The very first thing to do is to make sure your dog is getting sufficient physical and mental exercise every day. A tired dog is a good, happy dog and one who is less likely to bark from boredom or frustration. Depending on his breed, age, and health, your dog may require several long walks as well as a good game of chasing the ball and playing with some interactive toys.

Figure out what he gets out of barking and remove it. Don’t give your dog the opportunity to continue the barking behavior.

Ignore your dog’s barking for as long as it takes him to stop. That means don’t give him attention at all while he’s barking. Your attention only rewards him for being noisy. Don’t talk to, don’t touch, or even look at him. When he finally quiets, even to take a breath, reward him with a treat. To be successful with this method, you must wait as long as it takes for him to stop barking. Yelling at him is the equivalent of barking with him.

Get your dog accustomed to whatever causes him to bark. Start with whatever makes him bark at a distance. It must be far enough away that he doesn’t bark when he sees it. Feed him lots of good treats. Move the stimulus a little closer (perhaps as little as a few inches or a few feet to start) and feed treats. If the stimulus moves out of sight, stop giving your dog treats. You want your dog to learn that the appearance of the stimulus leads to good things.

Teach your dog the ‘quiet’ command. Oddly, the first step is to teach your dog to bark on command. Give your dog the command to “speak,” wait for him to bark two or three times, and then stick a tasty treat in front of his nose. When he stops barking to sniff the treat, praise him and give him the treat. Repeat until he starts barking as soon as you say “speak.” Once your dog can reliably bark on command, teach him the “quiet” command. In a calm environment with no distractions, tell him to “speak.” When he starts barking, say “quiet” and stick a treat in front of his nose. Praise him for being quiet and give him the treat.

As in all training, always end training on a good note, even if it is just for obeying something very simple, like the ‘sit’ command. If you dog regresses in training, go back to the last thing he did successfully and reinforce that before moving on again. Keep sessions short, 15-20 minutes max, and do this several times a day.

Q. Rescued a dog almost two weeks ago, and now that her kennel cough is gone her personality shines!! No previous training, how should I start?
ANSWER : A. POST FOUR:

After your dog is familiar with the behavior you lured from scratch, and taught to your dog, you can start to use the “no-reward marker” I talked about. What you do is ask the dog to perform the behavior, and if the dog does not perform the behavior, you simply say your no-reward marker (choose one: eh-eh, hey, uh-oh, oops) show them the treat, put it behind your back, and BRIEFLY ignore your dog. Just turn your back for a second or two, before turning back to your dog and saying, “let’s try that again.” When you’re ready to start over with your dog, make sure you move around. If you are repeating the same cue while in the same position, while your dog is in the same position, you are likely to receive the same results. The more you move around, and start fresh, the better your chances are of having your dog listen to your cue the second time around. BIG rewards when they dog it successfully! Lots of praise and treats.

My no-reward marker is “hey.” When my dog does something wrong I say, “hey” and she immediately understands that she needs to offer a different behavior. This is clear to her. I don’t have to say it in a mean way, I simply say, “hey” in a normal tone of voice and she understands what the word means.

Once you’ve built up that connection and communication with your new dog, you can work on all kinds of fun behaviors! I personally enjoy the more zen-like behaviors: https://www.youtube.com/watch?v=ruy9UMcuGh8

I like to teach my dog fun tricks that offer her a “job” to do of sorts like object retrieval: https://www.youtube.com/watch?v=I4iertZSva8

(object retrieval training completed; what it looks like: https://www.youtube.com/watch?v=jx0Dml28FGY)

Scent-games are fun too! Very confidence building. Hide a REALLY smelly treat in a box, and place that box in a line of boxes. Let your dog go in the room while saying something like “search!” or “find it!” and watch them hunt for that smelly treat! Lots of rewards when they find it!

Q. Why does a dogs pads on his paws turn such a pink color?
ANSWER : A. I’m confused here. Are your dogs paw pads typically black, but they turn a reddish pink? You may want to see your veterinarian about this to make sure there isn’t anything wrong with his paw pads. I’ve met dogs who have extremely fragile paw pads due to some bad genetics.. they end up getting injured on their paws very easily. I’ve met dogs who are unable to even walk on cement without wearing little doggy booties. It could be that your dog is dealing with some serious discomfort, and you want to get that checked out immediately.

If your dogs paw pads just seem a little bit irritated, you may want to try something like “Musher’s Secret” on them. This is an ointment that you rub on your dogs paw pads to keep them healthy, and smooth. I use this in the winter when there is rock salt all over the ground.. it keeps her paw pads from getting irritated and tearing open. It’s like lotioning your skin to keep it from getting dry and cracked. If you think your dog is dealing with something that is a little more extreme than just some dry irritated paw pads, then see your vet immediately instead of purchasing the Musher’s Secret.

Read Full Q/A … : Discolored Pads in Dogs

Q. What can I do to stop my dog from barking at people and front doors?
ANSWER : A. Ignore your dog’s barking for as long as it takes him to stop. This means don’t give him any attention at all while he’s barking. Your attention only rewards him for being noisy. Don’t talk to him, don’t touch him, and don’t even look at him. When he finally quiets down, even to take a breath, reward him with a treat. To be successful with this method, you must wait as long as it takes for him to stop barking. If he barks for an hour and you finally get so frustrated that you yell at him to be quiet, the next time he’ll probably bark for an hour and a half. Dogs learns that if they bark long enough you’ll give them attention.

Teach your dog the ‘quiet’ command. It may sound nonsensical, but the first step is to teach your dog to bark on command. Give your dog the command to “speak,” wait for him to bark two or three times, and then stick a tasty treat in front of his nose. When he stops barking to sniff the treat, praise him and give him the treat. Repeat until he starts barking as soon as you say “speak.” Once your dog can reliably bark on command, teach him the “quiet” command. In a calm environment with no distractions, tell him to “speak.” When he starts barking, say “quiet” and stick a treat in front of his nose. Praise him for being quiet and give him the treat.

When your dog starts barking, ask him to do something that’s incompatible with barking. Teach your dog to react to barking stimuli with something that inhibits him from barking, such as lying down in his bed.

Make sure your dog is getting sufficient physical and mental exercise every day. A tired dog is a good dog and one who is less likely to bark from boredom or frustration. Depending on his breed, age, and health, your dog may require several long walks as well as a good game of fetch and playing with interactive toys.

Q. Hi I have a dog 14 years old. She has growths.. Front paw and back hip.. Has had many skin problems.. She has been prescribed MANY pills.. No cure
ANSWER : A. Without knowing the nature of these lumps it is very difficult to discuss this further. Small needle or biopsy samples will help to identify the nature of these lumps and treatment options

Q. My 4 yr old male Catahoula Leopard Dog mix is a rescue. He’s become very possessive of me around larger dogs. How can I correct this behavior?
ANSWER : A. Sudden behavior changes can sometimes indicate an underlying health issue, so scheduling a checkup with your regular vet is always the first step. Once any health issues have been addressed, then you can address the behavioral ones. It is very common for dogs to become “possessive” of people or objects when around other dogs or people, and is called location guarding. Possession of objects or places can be a little easier to manage, however possession around other dogs can be treated as well. Working from a distance in a technique called BAT or Behavioral Adjustment Training may help. This technique involves your dog and another calm dog. Start off at a far distance and then move in until your dog becomes reactive or wary of the other dog. Move back a small amount and wait for your dog to become calm. If he shows calm behavior, reward with lots of praise, treats and love! If he becomes agitated or possessive, move back until he is calm, or stop the session completely and try again later. While this may take some time, it can help dogs learn that other dogs are not a threat to them or their people. Reading more information about BAT training or contacting a local trainer in your area can help with further advice and techniques!

Q. Why do dogs eat grass?
ANSWER : A. Some pet parents get concerned when they see their favorite canine nibbling on grass in the yard. They wonder whether it is because hunger, boredom or an indication of an underlying illness. Often the consumption of grass will result in vomiting because it irritates the stomach and gastrointestinal tract. This is an extremely common problem for dog parents. There is no one reason for why dogs exhibit these behaviors and it is very much dependent on each dog. Here are some of the reasons why our dogs choose to eat grass:

1. Nutritional Issues

Historically speaking, dogs are considered omnivores, which mean they consume a variety of both meat and plant-based food. There is some indication that dogs with a low fiber diet may choose to scavenge in the grass to fulfill this nutritional deficiency. These dogs may also find that grass has an appealing flavor and consistency. If you feel that this may be the reason for your beloved canine consuming grass then consider discussing with your veterinarian on how to incorporate more fiber into your dog’s diet.

2. Boredom

Many dogs who are not receiving adequate exercise will be become bored and search out activities to occupy their time, including eating grass. Evaluate how much exercise your dog is getting on a daily basis and consider more walks or other fun activities, such as playing fetch or tug of war.

3. Upset Stomach

There is a belief that dogs with an upset or gassy stomach will self-medicate by consuming grass. Vomiting often follows this grass eating activity eliminating the contents of the stomach or changing the gas distension within the gastrointestinal tract. However, there is not much scientific evidence to back up this theory. If you are concerned about too much gastric acid in your dog’s stomach or any other underlying medical issue that could be the reason for their grass eating, consult with your veterinarian.

Overall, grass eating is usually not toxic to your dogs unless your lawn contains chemicals, including pesticides or herbicides. Monitor your dog’s behavior along with his diet and exercise to determine if there is a reason for the inappropriate grass snacking.