Huey didn't eat all day today, he did drink some water but not very much. I was so relieved when he finally ate tonight, but then he threw up everything not even an hour later, his vomit was very dry, very little liquid. He ate again about an hour after that but threw it up also! Now I'm worried that he's sick, dehydrated... We have an apple tree out back and we've caught him eating apples a few times, we thought we'd picked them all up but I did notice some in his throw up. Could this be the problem?