I am building 2 small coop/runs for my 2 pair of sebrights, they have decided that they only like each other so they have to downsize. Each finished structure is 4 x 8 with a 2 story coop. My question is, since they are movable I can't put in the concrete moat like with my others so how do I protect them from digging predators? The coop part will completely close them in at night but I am worried about daytime. The sides will be 1/2 x 1 inch welded wire held down with washers. Any ideas are appreciated.