Hi there.
I agree with Todd about hotdogs. They are not only fatty but also too salty for dogs.
I used low calorie treats or dog food kibbles usually but for special occasions I give freeze dried liver treats. My dogs love them but you wouldn't want to give too much.
All my training treats are smaller that my pinky finger nail. Dogs can even smell tiny bread crumbs so treats don't need to be big, just enough size that they can smell and taste,
