Why is my dog's hair thinning on his muzzle, thighs, and chest?

Question

In the past 3 months ive noticed my dogs hair has been thinning around his muzzle,on his outter thighs and a small area on his chest.he has always had allergies and has always been sensitive to changes in routines.we just moved to a new place.but weve moved in the past and he hasnt had this.and theres no carpet.he also sometimes gags after coming in from going outside to go to the bathroom and he will every once in a while vomit clear liquid if he does.he doesnt have fleas. Pet's info: Dog | Chihuahua | Male | unneutered | 4 years and 6 months old | 4.4 lbs

Dr. Massimo Orioles, DVM, Cert AVP, MRCVS · Accepted Answer

This is probably due to an allergy, although it could also be infection or mites. First of all, in order to rule out skin parasites, you will need to treat with a high quality flea treatment, then ask the vet to perform a skin scrape - this might reveal an infection or a mite infestation. If all of those came back negative, the next step is to treat the allergy symptomatically and try to discover the cause of the allergy. Three main type of allergies are usually affecting pets: food allergies, flea and parasite related ones and environmental type (allergens coming from trees, pollens, dust etc etc). Some medications can be given by the vet in order to repair any possible skin lesions (like steroids and antibiotics). Hope this answer was helpful, but please do not hesitate to contact us again on the forum or by requesting a consultation if you have any more questions or to discuss it any further.

Why is my dog's hair thinning on his muzzle, thighs, and chest?

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