Small dogs can be perfectly happy in small homes. You just have to be sure to get them regular exercise and provide them with attention and love.

As toast said a dog rescued from a shelter is better off than not. Dogs are extremely social creatures and need a family. Though many shelters do their best they still fare better in a home with a human to give teem more attention than a shelter could.

I'm allergic to cats so I don't really understand how their brains work but from what I know they're also good for small homes?