Vomiting cat

My cat, Charley, is 6 months old, energetic, and by all accounts
healthy. However, lately he's begun vomiting in the morning after he
first eats his kitten chow. I think what is happening is that he
snarfs it down, drinks some water, then the kitten chow expands in his
stomach, and up it comes. Although it is rare, he's done it other
times in of the day. All occurrences seem to happen when he's not
eaten in awhile (although I leave kitten chow available to him 24/7).
Charley does not seem sick in the least. Just wondered if anyone else
had experience with this? Any thoughts would be appreciated.

Michelle