Place chicken livers and liquid in blender. Add egg, mix a minute more. Pour into bowl. Add flour, corn meal and garlic powder. Mix together. Spray rectangular cake pan with cooking oil. Pour mixture into pan. Bake 15 minutes in 200?C hot oven. Cut into small squares while still warm. Keep in freezer to prevent spoilage.
Preheat over to 180?C and grease cookie sheets with cooking spray.
In a large bowl, mash the tuna (or chicken) into smaller pieces. Add flour and milk. Mix well. Add water and oil. Mix well again. Add beaten egg. Mix well until dough is sticky.
Shape dough into small bite size balls, about the size of a marble. Place balls on greased cookie sheets. Flatten balls with hand.
Bake for 10 minutes. Remove treats from oven. Wait five minutes and turn treats over so other side will cook. Bake 10 more minutes or until golden brown in color.
Place treats on cookie rack to cool. Cool for 15 minutes.
You can add the catnip in the recipe or sprinkle on top of treats.
Store in air tight container and store in fridge or cool dry place.