Do dogs like to live with other animals?

Not necessarily. It depends entirely on the nature of your current dog. Some dogs like other dogs and some don't. If your current dog suffers from separation anxiety, having a companion may help ease his stress. BUT, a puppy can be a lot to handle, even for another dog. Often older dogs get stressed and annoyed by the playful antics of a puppy. The best thing to do would to be sure you properly introduce your current dog to any potential family additions. Make sure your current dog can handle having another dog around, and that they like one another, before you add that puppy to your family.