u/Big_Chapter5831

My hammy, Panko (1 year 3 months) has like progressive upper body hair loss. More noticeably behind his ears. His hair is somewhat thinner than few months ago. No sign of discomfort, inflammation, or excessive grooming….. but should I be worried? Could it be cuz he’s aging? :( last photo kinda shows the thinning behind the ears. I took him to the vet about a month ago, cuz there were bugs in his cage which i was worried was harming him (they were just booklouse and not harmful).