I have the same problem.My pup liked the taste at first and now won't eat it.She is a picky eater,so not sure if mixing it in food would work either. They often talk about using Karo syrup on this site-maybe try that?You can put a little in the water. Is that a special syrup--I live in New Zealand and haven't heard of that brand. Or is it just like any other one? does your pup eat well otherwise? He may not need the nutrical then.