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My dog has a crusty rash on s skin. I took m to our local

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My dog has a crusty...
My dog has a crusty rash on his skin. I took him to our local vet and she told me to bathe him often with a medicated shampoo and conditioner. She then put him on steroids and thyroid medication. He is all done with the steroids and the skin condition is back. It is so itchy for him. He has all kinds of allergies. He doesn't have much of an appetite. I feed him beyond dog food and sometimes boil hamburger so he will eat. His snacks are pupperoni and beggin strips. Today I put Aveeno eczema lotion on him . I have tried coconut oil. His skin is extremely dry and flakey. Do you have any suggestions?
Submitted: 2 years ago.Category: Dog Veterinary
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Answered in 39 minutes by:
10/26/2015
Dog Veterinarian: Doc Sara, Veterinarian replied 2 years ago
Doc Sara
Doc Sara, Veterinarian
Category: Dog Veterinary
Satisfied Customers: 952
Experience: I am a dog and cat veterinarian with a lifetime of experience in our family veterinary hospital.
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Hi there, I'm Dr. Sara. I'm a licensed veterinarian who works exclusively with dogs and cats. Skin disease is quite common in dogs - I've got lots of experience here.

The vast majority of itching and skin troubles in dogs is caused by allergy. I will start out by saying that allergic skin disease is a life-long condition that can be managed but not cured. It also requires patience and lots and lots of recheck appointments. There, unfortunately, is no quick or magic fix. Often in the beginning the allergy is steroid responsive (ie: gets better with steroid treatment) and they may only flare up once or twice a year, but they get worse as they get older, flaring up more often. For my patients who have infrequent flare ups, I’m usually just managing them on an as-needed basis treating the flare ups as they come.

Allergies can cause dogs to lick their paws and scratch in many places on their body. They can also lead them to get secondary infections with bacteria and/or yeast. Any secondary infections that may be going on, as these can make them much much more uncomfortable. This is often accomplished by topical treatments, oral antibiotics, and sometimes oral antifungals. It’s important to realize that it takes 3-4 weeks and maybe longer for bacterial and yeast infections to resolve with appropriate treatment. Sometimes the allergies are so severe that we have trouble controlling the infections, or the infections come right back as soon as the treatments are finished. In that case, we have to consider an allergy work up.

It’s very difficult to say what a dog is allergic to without a lot of testing.

There are three broad 'flavors' of allergy: flea allergy, food allergy and atopy (allergy to things in the environment like grasses, trees, or pollens).

With flea allergy, the itching and hair loss is centered on the caudal dorsum (the top of the lower part of the back), thighs, rear legs, and hind end. It's accompanied by the presence of at least one flea, usually many. Just one bite can cause an allergic pet to become intensely itchy and develop secondary infections that can perpetuate the itching even after the fleas are gone. Obviously flea allergy doesn't improve until the fleas are controlled. If you'd like more information about flea control, just ask and I'll be happy to provide it.

As for food allergy, pets can become allergic to a diet late in their lives just like we develop allergies as we age. In order to check for/treat for food allergy, we do what is called a 'food trial'. This is where the pet is fed nothing but a strict hypoallergenic diet. I use Iams Response KO, Royal Canin novel protein or Anallergenic diets in my practice however there are a lot of good diets out there. A pet must be on this strict food trial for 3 months to determine if it's really food allergy. I really recommend a food trial for dogs when I suspect allergy because if you get a good response from the hypoallergenic food, then you can give your pet less drugs in the long run. It’s important to be consistent and not give any treats that aren’t in the diet plan. Anything that goes into her mouth could cause an allergic reaction, so if she eats it and begins to itch it will mask any positive response you will see from the diet trial..

There are a number of treatments for atopy (or environmental allergy). Usually a food trial is performed first before these. A dermatologist can test the pet to find out exactly what they are allergic to and make an allergy vaccine, just like they do in people. This is called allergen-specific immunotherapy. Some pets can be managed with antihistamines (like benadryl) when all of their secondary infections have cleared up. Some veterinarians (myself included) have had a lot of success with a drug called Atopica. Atopica is a maintenance drug to help prevent allergy flare ups, however it can be very expensive. Another allergy maintenance medication that has great potential is Apoquel, but it is very new to the market and so far extremely difficult to come by.

If trips to the dermatologist and pricey drugs like Atopica aren't an option, many pets do respond positively to treatment with steroids. Steroids are potent anti-itch medicines but they do have long-term side effects. Steroids are great because they are very effective but if used too frequently can predispose your dog to developing life-threatening problems like diabetes. Typically I will use a course of steroids for a first time offender - in the hopes that it was a contact or seasonal allergen that will be out of the air by the time the steroids wear off. I encourage you to discuss the treatment plan with your vet. It’s also never wrong to seek a second opinion if you’re unhappy with your pet’s progress but be prepared that another vet may (or may not) recommend the same course of treatment.

I see that your vet prescribed thyroid medication - a low thyroid hormone can sometimes cause recurrent bacterial skin infections, which are very itchy. In that case, controlling the thyroid disease with medication should help decrease the frequency of these infections. If it doesn't, then we have to talk allergies again.

If I think a dog has allergies, but they don't respond well to steroids (meaning that they don't get any relief at all from steroids), then I am suspicious that they might have a mange mite infection like sarcoptes or demodex. These are significantly less common but they do happen.

In general for dry or flaky skin, a fish oil supplement can be helpful. There is also evidence to support that fish oil supplements can help with allergic disease as well, so it could be doubly helpful. My favorite product for dogs is Welactin:

http://www.nutramaxlabs.com/dog/dog-skin-coat-health/welactin

I know that's a lot to digest - please let me know what follow up questions I can handle for you :)

~Dr. Sara

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My goal is to provide you with the most complete and accurate “five star” answer. If my answer isn’t what you were expecting, it’s incomplete, or you have more questions PLEASE REPLY to let me know what information you are looking for BEFORE giving me a negative rating! Thank you so much :)

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Dog Veterinarian: Doc Sara, Veterinarian replied 2 years ago
Hi Pamela,
I'm just following up on our conversation about your pet. How is everything going?
Doc Sara
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Doc Sara
Doc Sara
Doc Sara, Veterinarian
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Experience: I am a dog and cat veterinarian with a lifetime of experience in our family veterinary hospital.

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