How about muffins? I have a recipe for kitty muffins:
170 g. cooked, diced chicken (about 1/4 lb.)
170 g. cooked macaroni
1 asparagus stalk, finely diced
1 tablespoon cooked liver, chopped
2 tablespoons milk
2 tablespoons ricotta or cottage cheese
1 teaspoon corn oil
1/2 teaspoon salt
2 tablespoons cheddar cheese, grated
Preheat oven to 190° C (375° F)
Thoroughly mix all ingredients except for the grated cheddar cheese
Fill a well-greased muffin pan (for 6 muffins) with the mixture, top with the cheddar cheese, and bake for 20 minutes.
Allow to cool before serving.
I usually give Jamie something he really likes to eat on his birthday, like shrimp, crab meat, or tuna (for humans). Vanilla-flavored quark or yogurt usually goes over well, too.