Hmmm - well Penny is 3 1/2 and she still gets 3 meals. Mostly because it fits in with her and our routines and because I think she'd be chewing her legs off if she went more than 5 hours without some grub 'cos she is so greedy. I'm not sure if there are any perceived drawbacks to this - I suppose if she were a worker, then you wouldn't want them eating then going back out very soon after, but I can't think of much else. I'd be interested to know if there are any other issues I haven't thought about.