I train with food, so I need to know when my dogs are hungry, how much to give them, and, because food is so important to them (I've made my dogs food-hounds) I can use plain kibble for training treats, and I don't have to give them expensive treats! LOL
And Penny, I keep mine even skinnier than that I'm obsessed with keeping my Doxies thin
i could take a few pointers from them!