Dandruff can be caused by all kinds of things and it isn't necessarily connected to food. Dry weather, stress and even swimming and allergies can cause it. If you don't think any of those are the culprits then it may well be the food. Adding oily fish (I use tinned sardines) and 1-2 raw eggs a week to a dogs diet can work wonders for the coat. Sometimes all that is needed is a bit of extra fat.So it's normal that my pup has dandruff? He is just about to be 5 months old. Should I worry about adding anything to his food yet?