Never heard of a fulminator darn spell check lol! I don't think that the furminator caused the dandruff! he has it and if anything the furminator is just getting the dead hair from his body and the dead skin is coming up too. I actually remember when I first started using the furminator on Coop i noticed the same thing but as for my experience I noticed it a few times but it never got worse. It more showed in the hair that was coming off of him than actually on his body. I am no epert but I think the furminator will help him to get that dead fur and skin off. I would use it a few more times and see because I didn't think Coop had dry skin either until I used that and I still don't think it is a problem what so ever! We will see what others say though!