If you’re considering adding a pet to your household, you’re likely thinking about dogs and cats. While some people opt for birds, fish, or even hamsters, there’s no doubt that dogs and cats are most popular. And the choice between the two is not very close. Over the last few years here in Nashville, I’ve noticed that even that choice isn’t very close. Dogs are the first choice for many, but as I watch people walk their pooch daily as I head to and from work, I wonder how single people find the time…