My 9 month old puppy used to love to eat his puppy food ....would eat all of it asap. I recently started using different food (not or puppies as suggested by his vet )and he wasn't crazy about it... i waited a few weeks hoping he'd warm up to it. I gave up and switched back to the puppy food he loved and now is is unenthusiastic about eating it. He finishes the food but he has to come back to it a few times to finish it....so sad. Any advice? What happened? I'm so sad watching him not LOVE his food. He moves the bowl around but doesn't touch his food. Kinda like saying, " I guess i have to eat it".