I don't think Roxy can tolerate fish oil either (my new vet mentioned not all dogs tolerate fish oil very well, allergy or not), but I am going to try again once we sort out the food thing. It's hard to say because it was almost a year ago I tried fish oil with her, and it seemed like it flared her up, but it's always so hard to tell exactly what it was that caused the flare up when there are so many uncontrollable potential irritants in the environment when dealing with Atopy. I'm using Platinum Performance right now which provides Omega 3 with flax mainly which Roxy does tolerate just fine. I'm hoping in the future I can add some fish oil along with the Platinum Performance and be ok.
Roxy - Feb 2005 - 75 lb American Staffordshire Bull Terrier (adopted Jul 2011)
Peewee - Jan 2006 - 8 lb Chihuahua (adopted May 2009)
Myka - Nov 1998 to Jan 2010 - 85 lb American Pit Bull Terrier cross
Lacy - Sept 1992 to July 2003 - 18 lb Reg Shetland Sheepdog