Just saw this message. Sorry for the delay. Inflight would be fine with whatever you are already giving him. This is a good age to start him since he is growing out of his puppy coat.
Here is my listing that tells you more about it- http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&ssPageName=STRK:MESELX:IT&item=290295981468
Let me know if you have other questions about it. Since the Staten Island Show is so local, it might be fun to give showing a try. Or you could go an observe and try it next year.
Oh, Georgie had 2 little girls.