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Dr. Andy
Dr. Andy, Medical Director
Category: Dog
Satisfied Customers: 30243
Experience:  UC Davis graduate, Interests: Dermatology, Internal Medicine, Pain Management
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My french bulldog is losing hair around his flanks. This happened

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My french bulldog is losing hair around his flanks. This happened last year and the vet took a skin scraping but all was clear
Welcome! My name isXXXXX am a UC Davis graduate, and currently, a Medical Director of a veterinary hospital.

I am sorry to hear about this concern for Louis.

1. Does Louis also happen to lick or chew his feet at all?

2. Does he ever chew by his butt area above his tail?

3. Has Louis ever had an ear infection?

Dr. Andy
Customer: replied 4 years ago.
No none of those symptoms
Okay Linda.
I ask, because hair loss in the flanks is quite commonly associated with underlying allergy issues. In this situation, it could even be a seasonal atopy (environmental allergy problem).

The skin scraping was very wise, as demodex or scabies can cause identical symptoms.

Fungal infection is less likely based on your description.

Hypothyroidism (low thyroid hormone), is also quite unlikely at this age.

So, I am still suspicious for allergy causes.

If there is no broken skin, redness (erythema), or crusting, that is all good.

One option is to try giving an antihistamine to see if helpful, and closely watch for any other scratching or licking.

Benadryl can be given at a dose of 1mg per pound of body weight. Keep in mind, Benadryl tablets and liquids come in different sizes. So, an approximately 25 pound dog can get a full 25mg tablet or a half of a 50mg tablet. I usually avoid the liquid Benadryl in larger dogs (you would have to give too much of it). You can give Benadryl every 8-12 hours.

Another favorite for dermatologists is Zyrtec (cetirizine) over the counter. Available in 5mg or 10mg tablets. A small dog 10-20 pounds can get a 5mg tablet once a day in the morning, but can be given every 12 hours. Any dog over 30 pounds, I typically recommend the 10mg tablet every 24 hours (or twice a day).

Even though it is not bothering him, it could still be significant, especially if it starts to result in large areas of patches. If persisting or getting worse, then definitely, a recheck examination or simply getting into a dermatologist specialist may be well worthwhile.

Food allergies seem a bit less likely, since food issues tend to be year around. So, I wouldn't jump to thinking about the diet as a cause or a need to change it at this point.

If worsening, another test to definitely consider is a blood profile, since many internal conditions can result in changes in the coat.

I hope that information has been helpful.
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Dr. Andy

Customer: replied 4 years ago.
Thank you his blood was tested and there were no internal parasites or such likes. I will try the antihistamine and see if that has any effect. Thank you
You are very welcome.
Good Luck!

Dr. Andy

Dr. Andy and 2 other Dog Specialists are ready to help you
I hope everything is going okay. May I be of any further assistance? I was not sure if my answer was satisfactory.