My husband would like to make my son a new cage for his pigs. He has one of the first homes (smaller cage) and since finding this website, we have found it is too small. He wants to use plywood for the bottom and put some sort of waterproof resign (not sure if that is the right word, but like fiberglassing the bottom so it is waterproof) on it so that the water and urine is not soaking into the wood. Is this okay for the pigs. I'm thinking when the bigger cage is done I will probably try the fleece for the bedding. We are now trying the litter box in the smaller cage to see what happens!! Thanks in advance for your input.