Some good training treats for a Pom/chi mix?

So I am housebreaking my puppy, he is having a tough time with this whole potty training thing, just when I think we made a breakthrough, he pees on my bed or something. But anyways alot of people say rewarding the dog is helpful when they got outside, but the puppy treats my husband got are so big for the puppy! If I give him a treat when he goes potty, he cant eat it quickly, he has to sit and work on it for a good 5 mins. Any treats that are for smaller breeds of puppy?