I have yet to make any for our unnamed duo but I did find quite a few recipes.

Cat Attack Cookies

1 C Whole wheat flour
1/4 C Soy flour
1 t Catnip
1 Egg
1/3 C Milk or cat's milk
2 T Wheat germ
1/3 C Powdered milk
1 T Unsulfurated molasses
2 T Butter, vegetable oil, or canola oil

Directions:
Preheat oven to 350F. Mix dry ingredients together. Add molasses, egg, oil and milk. Roll out flat onto oiled cookie sheet and cut into small, cat bite-sized pieces. Bake for 20 minutes. Let cool and store in tightly sealed container.


Tuna Balls

1 Can Drained tuna
1/2 C Cut turkey or chicken
2/3 c Dry Cat Food
Sliced vegetables (optional)

Directions:
Mix all ingredients in small bowl untill well mixed.

Form into small balls or anything your comfortable with.

Chill for about an hour. After that cover the balls in bread crumbs or anything crumbly.

You can find more here...
http://www.simplypets.com/pet-recipes/Cat/Treat