Hello I would like some advise on the chicken coop I am about to start. I plan on making it a 4'x8'x8' and it will be for 6- 8 chickens & the run will be a 25'x 25' square use 4x4 post and chain link fence. I would also like to know how far down i should dig around the outside or the run to prevent the gray foxes from digging under it. I plan on using chicken wire in the trench and burying it.