I have a friend who rescues pits, and she adopted out a very friendly female pit who was ok with other dogs. They got a daschund puppy, who the pit raised herself its whole life. They didnt crate her one day while they were gone, and they came home to a dead daschund. In my opinion, pits can be ok with other animals, but if they see a small animal go running past them, their prey drive is going to kick in and they are going to chase it. I firmly believe that you should never leave two dogs alone ever, and I think dogs should be crated when you leave the house, unless they can absolutely be trusted together. I would be very careful and watch them all the time, but I think it can be done.