It's generally agreed by snake owners that snakes should not be housed together, unless they're breeding or are a particular type of snake, but then why do zoo's house their snakes together? I've been to many zoos and they all had snakes, especially green tree pythons, housed in the same cage together and it wasn't even close to breeding season so there was no reason for them to be kept together. it's not like they were housing only copperheads and rat snakes together, So i'm wondering why do they do it when they of all places should know better.