Getting this unit initially for indoor use as a puppy pen came to a halt the first time I tried to put my 8 week old Great Dane puppy in it.  It isn't sturdy enough and even with the lock pieces in place, she drug the bottom panels all over the floor. LOL So in fear of her pushing it to an area where she could chew something I resorted to an old kennel I have for now, until she is used to being kennel trained. Then with this she would have more room to lay and play being safe {not getting into mischief haha}. Right now I will be using this outdoors for instead of tying her up at camp {camp rules :( } she can be safely contained in this along with my Doberman as well. :)