My dog doesn't like his food?

I have a 4 month old lab and he has always ate science diet because our vet convinced us that is was "the best." well, he has NEVER acted excited when we feed him he sniffs it and maybe takes a bite and then leaves it. if he gets hungary enough he will eat at least half of it. I don't leave his food out all day... show more I have a 4 month old lab and he has always ate science diet because our vet convinced us that is was "the best." well, he has NEVER acted excited when we feed him he sniffs it and maybe takes a bite and then leaves it. if he gets hungary enough he will eat at least half of it. I don't leave his food out all day cause i know that is bad so i have a time limit and i go pick it up and throw it away. and then try again at his next feeding. his vet says he is a very healthy dog, muscular, and not under or over weight. could it be possible that he just doesn't like science diet? oh and he does eat treats (and no i do not give him treats all day and that is why he is not eating) And i do feed him the right serving for his weight. any suggestions? should i try another food? and if so what is a good choice?
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