Yeah, that does sound very odd to me. I start feeding our females as soon as they lay. It takes a lot out of them and they NEED that extra nutrition after laying. To cool them right after laying without them building back up their weight would likely be very dangerous to their health. This guy sounds like a quack. Definitely get some weight on those girls, especially the pastel. I won't breed any female under 1,500g and I try to wait til they are closer to 2,000g if I can. As Zombie said, I don't bother cooling and ours breed just fine. Cooling, IMO, is more of a colubrid thing.