So my 10' x 6' x 6' dog kennel became the nighttime pen for my ducks, and the dogloo in there is their roost warm spot nightly. In the mornig I turn them out to the yard that has a 7' tall fence on three sided and the back of the house is the forth side, a good size are with a pond now too. The question is; the flloor of the dog run has now all turned to mud and dirt along with duck poop. Raking it out everyday is a real pain. What about gravel on the ground in there so I could just hose the duck poop down. Anyone else try this? The gravvel I have is rounded smooth edges about 1/2". So????? Also when I cleaned out the pen today I noted there was a fairly fresh groundhog hole in the pen underneath the dogloo. Im thinking maybe fine metal mesh underneath the gravel. I dont thing the groundhogs would go after the ducks but they do leave a deep hole the might could fall in or something?????Ideas???