the fence would just be if i caught the pup chasing cars...I can't keep it inside b/c everyone in my family has allergies witht he exception of me I twould have to stay outside...thats why i am worried about it feel cramped up... but i have already had 2 dogs die from being hit by cars so (they driver was drunk the first time, and the other my dog was being stupid...) I like the idea of taking it for 2 walks a day..that would be good for the both of us! I have just never really had the problem of lots of cars and a fenced in backyard