Not necessarily! Although chins are indeed herd animals in the wild, it seems to be a little more complicated in captivity. Not all chins will accept a cage-mate, or even an out-of-the-cage playmate. Unless you get a pair or group that has grown up together or is already bonded, bonding chins who are strangers can be a long and tricky process, and sometimes it just never works out. While they probably do get some benefit from being around their own kind (even if they're just in separate cages in the same room), most seem to do just fine on their own. They're not like, say, rats, where keeping them alone is practically a form of abuse. In fact, it's usually advised that you just stick to one chin unless you're able/willing to give each chin their own cage, because many chins just flat-out refuse to share their space peacefully. They can be very territorial, and often it seems that those territorial instincts override whatever social instincts they may have.