My Bo has had dandruff ever since she was four months old. I've tried supplements, shampooings, etc. but the stuff always comes back. Bo is not fat and she grooms constantly, so in her case I just think she has ectopic dermatitis (the fancy name for dandruff). Her previous owner suggested I take a dryer sheet (like Snuggle) and pet her back with it, it would help remove the dandruff from her fur and make her look better. I haven't done the dryer sheet thing yet because the dandruff doesn't bother Bo or me. If Bo has to have a health problem, this is the one to have because it's fairly innocuous although not pleasing to look at.