When I first got my chin I noticed she sneezed about once every day. It freaked me out and I told the vet at her initial appointment. She had no other symptoms. She still sneezes every 2-3 days now, like yours does. I think she's just sensitive. She only ever sneezes once, not multiple times in a row which is what my vet said to look out for along with an increase in sneezing and other symptoms, like Dawn pointed out.
I've cut back on dusting her because of the sneezing along with some dry skin and it's seemed to help. I dust her about twice a week now, sometimes more if it's humid but I used to dust her every other day. Her fur pretty much looks the same anyways. But yea, your chin is just sensitive.
