We have noticed the last couple days that Duncan is itching A LOT & has what looks like dandriff. I think he has a case of dry skin. The breeder gave us a bag of food which he said had some sort of oil mixed in. That bag is almost gone so should we mix something in with the new stuff we pick up? We have Dunc's 12wk vet appointment at the end of the month so we will ask him then but what can we try in the mean time?