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Experienced and professional animal trainer provide their insights in answering this question :
A. Have your dog checked for mites at the vet. Those tiny microscopic bugs cannot be seen by the naked eye but will cause discomfort and itching in the animal which if left untreated can cause open sores leading to infection.

How to Identify Common Pet Problems ?

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

Allergies are one of the most common reasons for a dog itching and losing hair. Dog dermatitis especially is a major cause of hair loss in dogs. Dogs can be allergic to pollen, mold, dust mites, or other environmental factors. Dogs can also be allergic to food.
Bald Spots in Dogs: Common Causes and Treatments. Allergies are a frequent trigger for hair loss in dogs. Like people, dogs can have an allergic reaction to foods, environmental triggers such as pollen, or to parasites like fleas or mites. Flea bites are behind most dog allergies, however.
Flea allergy dermatitis, seasonal allergies or atopy, food allergies, contact dermatitis (e.g., soaps and perfumes), and sarcoptic mange (mites) are some of the most common causes of pruritus in dogs. “Pruritus due to skin disease is one of the most common reasons dog owners seek veterinary care.”
Skin infections can cause red, inflamed skin that is itchy and hair loss can occur. Infections include ringworm, yeast, folliculitis and bacterial. Pus and/or hot spots are usually good indicators that an infection is present.
If your pet has severe itching, it is time to get them to the vet. However, for mild cases, giving them a soothing bath, antihistamines such as diphenhydramine (Benadryl), and an effective next-generation flea medication can all be a good place to start.
The 5 most common causes of bald spots on dogs include allergies, Cushing`s disease, pressure sores, genetics, and infection or infestation.
If food does not have adequate protein or fat, the dog may develop areas of hair loss or the hair may lose color. The haircoat may become dry, dull, and brittle.
Vitamin A: Hair loss and poor coat quality are one of the symptoms of this vitamin being deficient, but it is not common in a normal diet. If it is given in whole food like egg yolks and liver, it does not need to be further supplemented.
Brushing helps: Brushing out the old, dead hair on your dog will make him feel less itchy. Remember hydration: Especially during the winter season, rooms are dry and this can worsen itching. Don`t forget to place a bowl of water on the heater.
According to BeChewy, medium and long coat dogs should bathe every four to six weeks, and owners of dogs with short coats should bathe their pets somewhere between every month and every three months.
Mites can irritate your dog`s skin, leading to redness and inflammation. You may notice areas of skin becoming reddened or inflamed, especially in regions where mites tend to congregate, such as the armpits, groin, paws, around the eyes, and in the ears.
Demodex and Sarcoptes mites live within the skin and are too small to be seen with the naked eye. Ear mites are also so small that it`s unlikely you will be able to see them. Your vet can examine samples under the microscope to look for mites.
Dogs who keep itching but don`t have fleas or mites are more likely to have a skin infection. These infections may be bacterial or might be fungal. Yeast infections may also be a culprit for some itching in dogs.
Although there are a number of other more likely causes of itchiness in your dog, intestinal worms could be one of the potential causes. Behaviours that could link to itchiness caused by the presence of worms include any scratching of the rear end or rubbing or dragging their bottom on the ground.
If your pet is scratching or nibbling at their fur does this mean they have fleas? No, not necessarily. Irritated skin can be a result of many problems such as skin diseases, allergies, ear problems and other illnesses.
Once a week, spray your dog`s fur with the mixture. Although not scientifically proven to get rid of flea, the acidic taste of the vinegar may repel fleas and other parasites. If your dog dislikes being sprayed, dip a washcloth into the mixture and rub your dog`s coat. There is no need to rinse your dog afterward.
Balanced Breed Probiotics Dogs Itchy Skin

Studies have shown that probiotics can also reduce inflammation and help alleviate allergic reactions in dogs with allergies. By supporting your dog`s immune system from within, probiotics can help promote a healthy, itch-free coat.

Best Vegetables For Dogs With Allergies

They include green beans, carrots, zucchini, broccoli, spinach and cucumber, which are low in allergens and high in fiber, vitamins, and minerals.

Human medications such as Neosporin, hydrocortisone, and Vaseline should NOT be used. Topical creams and ointments tend to cause dogs to lick the area even more, so they should be avoided if possible.
Mange is caused by microscopic mites that invade the skin of otherwise healthy animals. The mites cause irritation of the skin, resulting in itching, hair loss, and inflammation. Most types of mange are highly contagious.
Coughing, diarrhea, vomiting and lethargy are the general signs the dog has worms. Other symptoms depend on the type of worm. For example, if your dog has a tapeworm, clear identifiers can be rapid weight loss or what appears to be grains of rice in their stool.
Symptoms of Chicken Allergy in Dogs

Symptoms could include red or itchy skin (especially on the paws, abdomen, groin, face, and ears), rashes, fur loss, or hives. Skin and ear infections commonly occur.

#1 Best Overall: Hill`s Science Diet Sensitive Stomach & Skin Dry Dog Food. The Sensitive Stomach & Skin dry dog food from Hill`s Science Diet is our top pick as the best dog food for shedding.
Dull, brittle coats and dry, flaky skin may be signs that your dog isn`t getting enough nutrients. Other causes are allergies and endocrine, such as thyroid. The omega-3 fatty acids that your dog is most commonly deficient in are those found in fish and flaxseed oils.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Q. My dog has no fleas, but is scratching and licking continually. He has been through a round of prednisone and it hasn’t helped. What can I do?
ANSWER : A. Itching can be caused by more than just external parasites, and if your dog is already on a flea medication, then it is possibly not the case. Itching can indicate anything from allergies to even minor skin infections causing problems. If your dog has been treated with prednisone (a steroid that inhibits the immune system) and it did not help, then looking at other options may help.

Food allergies are very common in dogs and can present with itching and licking all over the body rather than on just one spot. Common food allergens include ingredients such as wheat, corn and soy products, however dogs can be allergic to almost anything! Starting a food trial of an allergen-friendly diet from your vet or pet store that avoids these common ingredients may help. The food should be switched over a period of 7-9 days and then given about a month to decide if it is helping.

Small skin infections or yeast in the skin can also cause itching, however this itching is often more specific to a certain area of the body (such as the toes, or base of the tail). Your vet can perform a skin scraping of the area to be cultured at a lab to look for any yeast or bacteria. If they are present, a medication given either orally or placed on the affected area can clear up the infection.

In some cases, licking and chewing can actually be due to a boredom or anxiety behavior. Dogs may lick one spot obsessively to the point of creating sores or wounds in the area. Stopping your dog from licking and chewing either through the use of dog booties, no lick strips, T-shirts or even Elizabethan collars can break the habit and give the area time to heal. Licking and chewing can also cause the spread of bacterial infections so should be deterred even if not behaviorally caused.

Q. My dog licks his feet and legs and they are turning brown. He is a white dog. Can you help?
ANSWER : A. Licking the feet and legs can be caused by a number of things in dogs including allergies, illness or even stress behaviors. Allergies are the most common in dogs, with yeast infections coming in second. Allergies can cause the area to become red and itching, making your dog want to lick and chew on them. Over time, the area may become stained from saliva, especially in lighter or white-coated dogs. Yeast infections are also common between the toes, and may cause a smelly “corn chip” smell to appear near your dog’s feet. Again, dogs will attempt to lick and chew to relieve the itch. Keeping the feet clean and dry can help relieve both allergies and infections and pet wipes or a baby wipe of all paws when your dog comes in from outdoors may also help. Keeping your dog from licking the space with either dog booties or an Elizabethan collar is also good as it will prevent secondary infection and staining of the paws and legs. If your dog is determined to keep licking and keeping the feet clean and dry do not help, then your vet can help by providing a medication to treat any infection or provide relief of allergies.

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. My dog keeps licking himself in the same area, what does this mean?
ANSWER : A. Excessive licking in one area often leads to a condition called Acral Lick Dermatitis or Lick Granuloma. By constantly nibbling on one spot, which is usually on one of front legs, dogs can cause skin irritation and inflammation and not uncommonly skin infection.

There is a long list of possible causes of this problem. In many dogs this is purely a behavioral issue related to anxiety, boredom or stress. Dogs with joint pain like to lick over the painful area to alleviate pain. Skin allergy or infections, skin foreign bodies predispose dogs to Acral Lick Granuloma as well. Finally, low thyroid hormone level is believed to play a role in developing Lick Granuloma.

Treatment is often long, and close cooperation between the owner and the vet is required. The effort should ultimately be directed to identify and treat the underlying cause.

Read Full Q/A … : Excessive Dog Licking

Q. My dog licks mostly legs to the point of taking fur off. She itches fur is thinning she looks like her skin is peeling off But no infection though
ANSWER : A. Have your dog checked for mites at the vet. Those tiny microscopic bugs cannot be seen by the naked eye but will cause discomfort and itching in the animal which if left untreated can cause open sores leading to infection.

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. My sister’s dog is digging the hair off from his legs. Any advice?
ANSWER : A. Biting and chewing to the point of hair loss can be caused by a number of things. Allergies, skin infections, and even metabolic illnesses can all cause the skin to become bothersome, or hair to be lost. In some cases, the behavior of licking or chewing at the hair can become chronic, and lead to infections or sores on the leg.

It is best to have your sister bring her dog in to have the legs looked at. Your vet can check for any signs of infection, allergy or even external parasites and provide treatment for relief. If there is no apparent cause, your vet may also recommend a blood test to check for internal illness as the cause.

Until you can get to the vet, it is best to prevent the dog from licking or scratching at the area. An Elizabethan collar (cone) is best to stop the behavior and allow the legs to rest some until they can be examined. If there is any dirt or debris in the area, a warm clean washcloth can be used to keep the area clean and prevent secondary infection until it can be examined.