We just bought a new chin. We have another one that we've owned for about year....We will obviously will get the new chin adjusted to his cage before we move him to the chinchilla mansion with our other chin...However...We put our new chin inside his cage...and let our old one out, and our old chinchilla didn't take to well to our new chin. He Starting barking, and trying to stick his face in the cage. Our new chin didn't seem to have much of a reaction or to care. we are just wanting to know some tips to introduce the two later down the road, having play time together, and eventually sharing a cage. They are both males.