Experienced and professional animal trainer provide their insights in answering this question :
A. It could be external parasites such as fleas or demodex or maybe a dermatitis. You should see your vet as soon as possible to diagnose the cause and then you can treat appropriately.

How to Identify Common Pet Problems ?

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

Atopic dermatitis is one of the most common causes of itching in dogs, just behind flea allergy dermatitis. These allergies may also result in ear and body scratching, ear and skin infections and foot licking.
Three common causes of itchy bottoms are fleas, worms and anal glands issues with anal glands being top of the list and the main focus of this discussion. Less common causes are allergies, skin infections and tumours.
Common causes for a dog constantly licking their paws or chewing include environmental allergies and food allergies. Environmental allergies often begin when the dog is 2-4 years of age. They will come and go with the seasonal exposure to the allergens and may be accompanied by an itchy face and rear.
Most dogs will scratch at their ears because there is a little allergic inflammation first, and then they develop infections as a secondary problem.” While you can treat for temporary relief from allergies, you need to determine the causes and take appropriate action to make sure they can be managed effectively.
Signs of ear mites in dogs include scratching around the ears, head and neck, skin irritation, head shaking, the presence of an ear discharge that is dark and waxy (resembling coffee grounds) and an unpleasant odour from the ears.
Pruritus in dogs is the sensation in the skin that causes them to scratch. It is a symptom caused by dry skin, allergies, parasites, or other underlying conditions. Anxiety and boredom can cause dogs to lick, chew, and bite as a response. Changing your dog`s diet may be the key to stopping obsessive licking behavior.
Frequent licking builds up moisture in a dog`s paws that can lead to a bacterial or yeast infection, according to the American Kennel Club. These issues only aggravate paw licking and may cause swelling or redness. Work with your veterinarian to diagnose and treat bacterial yeast infections.
The paws are a common site for a yeast infection in a dog. If your dog is licking or chewing at their paws, they may have some pain, discomfort or itching there. Yeast infections are one of many reasons why a dog`s paws might be irritated, and constant licking can cause more inflammation and discomfort.
Yeast infections in dogs` ears typically result in head shaking and rubbing, itching, odor, redness, and brown discharge. Ear mites in dogs have many of the same symptoms, however, there are a few slight differences. Ear mites cause a dark discharge from the ear that can be waxy or crusty.
Ear mites are barely visible to the naked eye. They are very tiny but may be seen sometimes as small moving specks. Under a microscope, ear mites look like tiny spiders or ticks.
Plain Sugar-Free Yogurt: Feeding your dog plain yogurt might also offer relief from itchy skin. If your pup happens to have a food allergy, then plain yogurt can help soothe their digestive system and stem the scratching.
Antihistamines with the active ingredients of diphenhydramine, chlorpheniramine, cetirizine, clemastine or loratadine are usually safe for most healthy adult dogs. Hydroxyzine is another dog-safe antihistamine and one of the most effective available, but it`s only available on prescription.
The most common causes of itchy dogs are parasites such as fleas and mites, food allergies, seasonal allergies and skin infections. Goals of treatment are to provide comfort for your dog and therapy will depend on the diagnosis.
Signs of heartworm disease may include a mild persistent cough, reluctance to exercise, fatigue after moderate activity, decreased appetite, and weight loss. As heartworm disease progresses, pets may develop heart failure and the appearance of a swollen belly due to excess fluid in the abdomen.
Your veterinarian will take a stool sample to test for the presence of microscopic eggs laid by adult worms. The veterinarian will then mix the sample with a solution that makes the eggs more visible underneath the microscope. In some cases, a routine stool sample test may be insufficient to diagnose a parasite.
We discuss different types of worms and symptoms further down, but the easiest way to tell if your dog has them is by looking at their poop. Most worms are visible in their stool, and come in a variety of sizes. Other common symptoms are weight loss, increase in appetite, bloating tummy, diarrhea, and vomiting.
NO! People may believe because worms are usually harmless in humans, that they`re probably not too dangerous in dogs either and that they can rid themselves of them, but this is not the case. Dogs cannot get rid of worms themselves. Medical assistance will be required to some extent.
Although we associate fastidious grooming with cats, dogs lick themselves to stay clean too. They will lick their paws, legs, and body, so why not their crotch? They need to keep their genitals clean from dirt and discharge, and they don`t use toilet paper for their anal region, so their tongue is the way to do it.
Dogs have several reasons for staring at their owners, like to communicate with and understand us. Some dogs stare to manipulate owners, as in with begging for food or asking to be let outside. Training and dog sports are good ways to turn focused staring behavior into a positive experience.
When some dogs eat ingredients such as chicken, wheat, corn or other individual items, ingestion will trigger an allergic reaction that can alter the natural flora and allow an unnatural growth of yeast. If your pet suffers from yeasty ears, attempt altering their diet to eliminate common triggers.
Gastrointestinal (GI) issues are another common cause for dogs who excessively lick their paws. This study found that a majority of dogs who showed signs of excessive licking had gastrointestinal abnormalities.
Symptoms of a yeast infection include red, itchy skin, discolouration, and a sweet, musty odour. If a yeast infection is present in the paws (one of the most common areas), the paws will become red and itchy, and there may even be a brown discharge present in the nail beds.
You may think it`s necessary to know what ear mites look like in dogs in order to tackle them, however ear mites are so small that it`s unlikely you will be able to see them. It takes a vet with an otoscope or microscope to properly spot an infestation.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Q. One of my pet’s ears seems very irritated. What I can use to clean it with?
ANSWER : A. Ear Irritation can be caused by a number of things ranging from allergies, ear infections or even mites. Dirty ears can also cause irritation and problems. Knowing the type of problem is best for figuring out how to treat it.

For plain dirty ears that do not have any odor, redness or leakage of discharge/debris, a simple over the counter canine ear cleaner can be used. Gently soak some cotton balls or a washcloth with the cleaner, and then use these to wipe out the flap of the ear and opening to the ear. Do NOT use Q-tips as these can become stuck or lodged in the curve of the ear canal and may cause injury to the ear drum.

If the ear is bright red or itchy without any dirt or debris in it, it may indicate an allergy. Sometimes an allergy medication can help provide relief in this situation. Your vet can give you the correct dosages of an over the counter allergy medication to use, or may recommend one specifically for dogs.

For infections and mites, changes to the ear such as bad smell or lots of debris and discharge, flecks of black or brown debris, or scabs and sores in the ear may be present. In these cases, it is best to have your vet take a sample of the ear debris to test for mites or infection. Your vet can then give you an ointment that is placed and left in the ear between ear cleanings. Most vets will then recommend cleaning the ears twice daily and then leaving in the ointment after for a period of ten days.

Ear mites ARE contagious to other pets, so if your dog does have them, it is best to treat any other pets in the house at the same time to prevent the mites from spreading around continuously.

Q. I have two problems with my 16 yrs old dog: he’s constipated and has a ear ache. What can I use to relieve these?
ANSWER : A. Constipation is a common problem in dogs that can be due to a number of things. However it is a good idea to make sure the constipation is not actually diarrhea, as some dogs can strain after a bowel movement, making it look like such. If constipation is present, adding a little pumpkin puree or plain yogurt to the diet can help make digestion easier and make stools easier to pass. However if symptoms do not resolve after a few days, it is best to speak with your vet.

For ear aches, it is best to have your vet examine the ear as many things including allergies, ear infections, mites and more can cause ear problems. If the ear is just dirty, then cleaning the ear gently with cotton balls or a clean washcloth and a dog ear cleaning solution can help. Do not use Q-tips as a dog’s ear has a 90-degree turn in it and placing Q-tips in the ear can cause damage to the canal or inner ear. However if the problem persists or cleaning does not help, it is best to seek care.

Q. My dog is having ear problems. I have had her at two vets and they can not seem to find the cause. Can you help?
ANSWER : A. For a pet with chronic ear issues I would recommend checking her thyroid levels. Hypothyroidism can be a cause of chronic ear infections.

Then I would recommend having a bacterial culture of the ear debris to ensure the appropriate antibiotic is chosen to completely rid the bacteria in there. If there is resistant bacteria, the ear will appear to get better at first but then once ear meds are stopped they will thrive again and cause a re-emergency of the ear infection. Also longer treatment may be needed, for example instead of 7-10 days, perhaps 14 days continuously.

If all else fails, I would recommend a skull radiographs to look for signs of a narrow ear canal and/or an inner ear infection which will require not only topical antibiotic ointments put into the ear, but also oral antibiotics.
Most ear infections are caused by moisture in the ears, narrow ear canals, hypothyroidism or skin allergies. Each one has to be gone through systematically.

Q. Dog has dry ears and it itches him. Any recommended soothing lotions??
ANSWER : A. I will answer this question as if you are speaking of the inside of the ears (not the external). Most dogs ears aren’t dry unless they have other skin issues such as skin allergies, which can be seasonal or year around and caused by many different things, such as foods, environment, dust, grass, pollen, and products (shampoos, perfumes, etc). Check in the ears for waxy build up. The ears should be clean of any wax and dry. If they have build up, I would take a cotton ball, and soak half of it in a dog ear cleaning solution. This solution should be made specifically for dogs, and your local vet would most likely sell the appropriate brand.

I would address any possible skin allergies, if they do not have any other skin issues, then looking inside the ears and cleaning with a good ear cleaner (should be alcohol free—because alcohol is very drying) If the ear scratching continues regularly then bring him/her into the vet to have a proper ear exam.

Q. My cat continues to scratch on furniture and carpets. He has plenty of scratching posts around the house. Please help!
ANSWER : A. Scratching is a natural behavior in cats that can be frequently frustrating for pet owners who want to keep their furniture from being shredded on a constant basis. The texture of furniture and carpet is very appealing to cats and this why they frequently choose to spend their time on this activity as opposed to playing with their own cat toys. Here are some suggestions to help curb this unwanted behavior:

1. Purchase a cat scratching post or cat tree that is covered in carpeted or textured material. Place it in an appealing spot that your cat would be inclined to spend time (eg. in the sun). You can also place catnip on the scratching post or cat tree to make your cat even more interested in the new object.

2. You can utilize double sided tape on the ends of the furniture because you cat will not like the sticky feeling and will learn to not scratch in that region. Use the tape that has a lighter adhesive in order to prevent any permanent damage. Other materials, such as aluminum foil or bubble wrap can also be placed on the furniture to discourage the scratching.

3. Keep nails trimmed short by either learning to do this on your own at home or using a veterinary technician, or groomer. Nails can usually be trimmed every 6-8 weeks.

4. Redirect the unwanted behavior. If your cat begins scratching, use a favorite or new toy to distract the cat from the scratching. Give your cat positive praise for not scratching.

5. As a last resort you can use a spray bottle full of water to spritz your cat when he or she is scratching inappropriately at your furniture. Generally, cats do not like water and this will discourage them from continuing the behavior.

Have patience with your cat because it can takes time to understand this is an unwanted behavior and that furniture is not another toy for them to use. You can always consult your veterinary or veterinary behaviorist to help with ideas or further solutions to this problem.

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Q. My dog scratches his ears (inner) a lot. I looked online and they said that dogs easily get ear mites. Does having ear wax mean having ear mites?
ANSWER : A. Most common reason for itchy ears and excessive wax production is bacterial ear infection. Ear mites can happen but are less common than bacterial infection. most of ear drops for dogs contain medications for all fungal, bacterial and parasitic infection.

Q. My dog keeps shaking his head at night and is very anxious acting? We’ve cleaned his ears and putting ear drops in hasn’t helped?
ANSWER : A. It sounds like ear canal infection. I am not sure if you used ear drops to clean ears (they do not contain antibiotics) or ear drops from your vets to treat ear infection. In case you used ear cleaner only you should take your dog to your vets to get antibiotics. If you are using antibiotics drops and there is no improvement your vet may recommend taking a swab from the ear to check what bacteria, fungus or parasite is responsible for the infection and then pick the most effective medication.

Q. Can you use Floxin Otic for ear infections on dogs?
ANSWER : A. Floxin Otic is an ear cleaning solution designed for the clearing of ear infections in people. While it may be similar to dog products used for ear infections, it is best to bring it to your vet’s attention first so he or she can compare it to dog-safe products. It may be that it is in the same concentration and can be safely used, or your vet can instead recommend a product that is in the right formulation.

If you are seeing an ear infection in your dog’s ears, your vet can provide you with a dog-safe medication to use. Ear infections are usually treated over a period of ten days and involve cleaning the ear 2x daily and then placing the otic ointment in the ear to stay in place until the next cleaning.