Fortunately ive never had that problem but i can see it how easy it could had happened before i started useing above ground pens. But the the thing that comes to mind for me is how much less of problems I've had with cleaning and overall health of pups and and my bitch. I use to keep mine in kennels to and the frist thing my bitch
would do and pups when they got of age of course was come out during cleaning or feeding ect was run threw shit. Lol but havn't had that problem since.