i dont like the treats u can buy...i rather do some up myself.
because first off the treats u buy arent anything more special than their usuall dry food (if u feed dry) and also they dont taste as tasty as own made stuff (not that i tried the difference hehe)
cut up cheese, bits of sasauge, cooked chicken (mine will dance on one foot for this), liver (again works the best but might be to hard on puppys stomach so not too much of this).
i tried to teach cobi "down" for two months with the treats u can buy and then i started using self made treats and 2 days later he knew "down" perfectly as i guess it was more worth the work for him