What do you do with spare yolks?

I made dad a cheese omelet earlier with just egg whites, now I just have to figure out what to do with the leftover yolks. I'm thinking I might scramble them up for the dogs or something. Maybe make some sort of dog treat recipe that I can use the yolks in?

I did a fast search and came up with the following recipes I might look more closely at for ideas on where to start with creating a recipe to use up the yolks.

Rid-A-Flea Dog Treats

Dog Treat Recipes: More Biscuits

Dog Treats Recipe

Dog Treat Recipes for a Peppy Pooch