Diy Dog Runs . Add the post to the hole, then pour the concrete around it to fill the hole. Reciprocating saw if you are adding a gate or need to cut the panels. How to Build a Dog Run With Attached Doghouse howtos DIY from www.diynetwork.com With grass as the floor, this dog run may also serve as a place to potty train your pouches. You can either use natural grass or artificial grass. See more ideas about dog runs, dog kennel, dog houses.