I am going to be ordering some chicks to raise for laying hens. Once old enough, I want to have them in a tractor. My fear is, most tractors I have seen do not have wiring on the bottom. It seems you could not have small enough wiring to be predator safe and still allow them to graze/eat the grass which is what the tractors are "for", IMO. So I DO want a tractor, but worry about not having wire on the bottom in fear that predators could dig under, etc. and get the birds. Does anyone have a predator safe tractor that someone could still (easily) move around as a tractor is supposed to be? If so, could you post pictures please?