How many households don't own dogs?

Well, sometimes it depends on the person(s) that get a dog. Sadly, majority of those who do get a dog won't keep the dog due to not realizing how much responsibility comes with ownership. Also, the cost of caring for a dog can come as a shock to some. Other reasons for a dog owner to give up their beloved pup may be due to falling on personal or family hardships and are unable to give their dog the love and care that's needed.

So, if you are thinking about getting a puppy/dog make sure you know all that is involved in taking good care of your dog. I've heard some say having a dog is kind of like having a kid. Lots and lots of responsibility, time, money, and love. =)

I guess to answer your question short and simple ... not many.