Hi, this is Dr. Thompson. I’ve been a dog and cat veterinarian since 2000. Thanks for your question. I understand your dog Wrigley has been scratching and chewing the back part of his body. I'll be back in a few minutes with some advice...
I wonder if Wrigley has ever had any skin, eye or ear symptoms in the past that could be consistent with allergies? Although there are many causes of itchy skin with hair loss, the most common is allergies. Now, just what Wrigley is allergic to is unknown. The biggest source of allergens for dogs is pollen. They inhale it and it also gets on their skin. Allergies tend to flare up in the spring and fall and be quiet the rest of the year.
If you're seeing sores, he might have a secondary bacterial infection. I sometimes treat this type of infection with oral antibiotics, depending on how severe it is. Milder infections are treated with topical medications and frequent bathing. Bathing also helps remove some of the allergens from the skin. You can use an oatmeal shampoo and a pramoxine leave-on conditioner to help with the itch. Here's a good conditioner I like on Amazon: conditioner. You can bathe Wrigley every day to every other day while things are severe.
Now, I didn't mention the flea factor. If you live in a place where fleas are common, make sure you're providing excellent flea control. Even if you don't see fleas on Wrigley, there could be one or two. Some dogs are so sensitive that they stay super itchy for a long time from even a few flea bites. You should use either an oral flea control med like NexGard or a spot on like Frontline. Clean your house and use something like Fleabusters powder to help kill immature fleas on floors/carpets/furniture.
My clients sometimes give antihistamines to help with all sorts of allergies. The standard dose is one 25 mg pill per 25 pounds of body weight twice a day.
A hypoallergenic diet can help some dogs. If you want to try that, I suggest getting a prescription brand since the over the counter kind are unreliable. Honestly, though, allergies to pollens are much more common than food allergies although more than one thing could be going on.
Anything I haven't covered?
It certainly could be! Time for flea warfare :).
Good-- keep up with the bathing and try the oatmeal shampoo and pramoxine conditioner.
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