Excuse me, what's the matter with dog alopecia areata, analysis of the cause of dogs and alopeciacopy hair loss

Excuse me, what's the matter of dog alopecia areata, what is the cause of the cause of the alopecia andata hair loss of dogs ... Excuse me, what's the matter of the alopecia areata, what is the case of the cause of the dog's alopecia and the hair loss