i put on 15kg's (33lbs) after my last contest in 10 days. I had trouble breathing, my legs swelled up. My legs got pumped doing anything! I couldnt walk more than 10 metres before they would cramp. I almost didn't make it to my car a few times to go to work. Extremley painful.. Never want to do that again ever.
Kai Is much much larger though so im sure he can deal with the added food a little better.