More muddy feet

Just went to close the backdoor because Baxter had come in a minute or so ago and I noticed that his paws were awful muddy. I took him out with a towel to clean his feet and I heard water. I looked over and there was water pouring down from the faucet cover out back. The cover was still on (freeze cover) but water was coming down and the dirt underneath it had big foot prints in it. I took the cover off and turned the valve to shut off the water. It must have been running for a little while because it is very muddy right there. Not sure how he managed to get the water on with the foam cover still intact.