My 14 year old lab is losing hair on her nose (again). The same thing happened when she was about 10. Her nose was bald for about 2 years, then randomly started growing hair again. The baldness is just on top of her muzzle, starting right at her nose and going about 2-3 inches back. It's not her whole muzzle, only about an inch across. The skin isn't dry, flaky, discolored, itchy, or irritated, there's just no hair. What could cause this? Why would it suddenly resolve, then start again? Nothing changed in her diet, environment, or routine.
I've been putting neosporin on her nose, but it doesn't really make a difference (other than making her trying to lick her nose. Which is adorable)
Sitting at the annual veterinary dermatology conference yesterday, one of the lead endocrine veterinarians from UTenn showed pictures of hypothyroid dogs with hairloss on the nose... She stated this is a common area of hairloss.
I would do a Michigan state premium diagnostics thyroid profile.