I am building a 2 dog kennel. It's total length is 20×10. It will be on concrete, and 3 out of the 4 sides open ( closed side is facing the north) I am looking for any ideas for easy cleanup of stools and urine. I pressure wash every day but looking for easy drainage options for waste to wash off and away from the kennel. Maybe some sort of sub-buried PVC in the slab and draining out? Any ideas would be great.