We have to watch Tips playtime...she obsesses and will run around that pool until she tears the pads right off her feet..she has done it twice before. She managed to tear two out of four this time. She was gimpy for a couple of days but is recovering. The first time it happened, we didnt know it would happen. Afterwards I had to keep antibiotic ointment on her feet, wrap her feet in gauze and I would strap baby socks on her feet for cushioning! She hated it and would always try to pull the socks off, but it worked til she could stand without it hurting so much. That is a border collie for you, they never never ever stop, they just keep on no matter what.