If I were going to adopt a pet, I definitely think it would be a homeless person. If you think about it, there are a lot of similarities. All you need to do is put out a bowl of food and water, have a box for them to sleep in, let them out to use the bathroom once or twice a day, give them a bath once a month and keep the toilet lid down so they don't drink or play in the water. Plus, I think you could teach a homeless person better tricks, especially if food were involved and that would be more entertaining.