I am fostering a momma dog and her seven puppies from our local animal shelter, but I don't have a fenced in yard. The puppies are only 2 weeks old right now, but I know when they are old enough to go outside it will be pretty hard to control them all. I do have a yard, it's just not fenced in. So does anyone know what size of a pen I would need to keep them in when I take them out to use the bathroom? Don't worry people, I am not leaving them outside in the pen! I only need something to have them in when I take them out to potty. So since they won't be in it a lot, i figured it wouldn't have to be too big. I was looking at the collapsible ones at petsmart, and they are about $75 bucks, but I don't know if they are big enough. I really would like it to be under $150 if possible. Any suuggestions? Oh and I will only have the puppies until they are 9 weeks old so they will not be huge and won't take up too much room. Thanks!