I have 2 kittties.  Both 2 years old, brothers.  The one literrally projectile vomits after eating 1/2 of a 3oz. can of their fish, especially cod, sole and shrimp.  I'm thinking something may not be right with it... but my other kitty is fine.  I know it's on the cheap end of cat food.  I usually get chicken and beef, ground only.  This sits well in their bellies.  I'm thinking of trying the Merrick brand.  Any recomendations?