They are all for small breed, the Zuke's are soft bite size ones, the Canidae are small bite size but are crunchy, The Natural Balance are for small breeds, they are a little larger shaped like a little bone, but not real hard, just a little harder. But I will definitely read the fine print on all of the bags, I would think the softer small treats would be best, Zuke's is a good brand, I've heard.....Have to give her some kind of reward when she potties on the potty pad..LOL, just want to make sure its the correct treat.