Let me give some background info: I've only lost 1 chick to a cat. I have 30 chicks that are 3 days old. I am going to move them outside with a lamp. Will this be secure? Outermost perimeter- 6 foot chain link fence Inside Perimeter- 1 black lab-doesn't touch chickens pasture fence (chicken area) Inside the pasture area there is a rabbit hutch converted to a coop with a small run covered over head with netting. Then I am taking my old trampoline and stapling it to the side and want to bury it into the ground. But how far to bury?