I woulden't give cod liver oil, its too easy to overdose them on it IMO.
Salmon oil would be better, you can't really overdose them on salmon oil as its completly natural so although I do give them set amounts, I feed safer about it.
Perhaps its allergies, what are you feeding him?
__________________ Indy, Benjamin and Malachi   There is no psychiatrist in the world like a puppy licking your face- Ben Williams |