You could try cooked, (simmer for 30 mins) deboned chicken and plain boiled rice, together with a vit/min supplement. About 40% chicken 60% rice by volume. Its a good "recovery" food after ops, and most dogs love it. If they like "wet" meals you can add a little of the broth you have cooked the chicken in. I buy bags of cheap "budget"joints from the supermarket or you can buy minced chicken from dog food suppliers, but mine prefer the "human" quality.