I just finished building my quail pen with my dad 2 days ago and i let the quail in it. Checked in it this morning at 10am and they were fine than my dad checked them at 5pm and the quail were gone and my pen is messed up. I dont know what it was but i do know that my neighbors have a evil dog that keeps getting under our fence and tore up my raspberry plant shreded leaves and the root ball. I guess it could have done similar damage except the back section is a weird hole. I have also seen foxes in our neighborhood.