ive been trying to figure out the best way to fix my hovabator that either my little boys got too or the chickens, it has holes! one of the corners is missing a fairly large chunk so much that even when the top is on there is still an inch gap, what can i use to fix it? duct tape? some kind of aquarium sealant? or is the best thing a whole new one? i really dont want to buy a new one so any suggestions would be great thanks!