Do dogs have to learn how to use a kong or is it instinctive? We have a kong for our 5 month corgi, but he doesn't seem to like it that much. I've put a really smelly treat in small bits on the inside, a little bit of the kong spray and then a biscuit sticking out of it. He'll eat the biscuit, but he doesn't seem to try and eat the kong spray (like ezy cheese but chicken liver flavored). He likes all three separate I know.