I'm not thrilled with this. I had bought it for 2 month old puppies. It was backordered numerous times and by the time it arrived they were 3 months old and despite the fact that one was only 8 lb and the other 20 lbs both were able to climb over/out of it the first time I tried to keep them in it. It's clearly intended for outside because without the connecting poles being stuck into the ground it has nothing to keep the walls from moving with the slightest bump. What I don't get is why it only has 2 ft tall walls when it's like 10 ft by 10 ft inside. what do you think we're putting in this enormous 10 ft x 10 ft space and why would you think it's so small that it couldn't get out of a 2 ft high enclosure? Bad design. Not tall enough to keep anything in.