most all chameleons HATE other chameleons, sometimes you will get exceptions but it's rare. definitely make a huge one and put a divider because chances are hey will compete and can seriously injure each other.If you want to see how they are together at some point make a large free range attached to the cages and watch them to see what happens. But WATCH, don't leave them alone. Don't ever try housing them together though because in a cage they can't get away from each other and if one is seriously ticked the other one is in for trouble.