I cant give away my patent design,but heres the jist. Plastic garden netting with the half inch square holes.(tractor supply) Cut to leangth,as long as your coop. Roll untill you have about 6 coils.wrap that with another piece leaving the opening down. Put around your coop with steak it every so often.(Also works great along water ways)............Here's my boy's with the evidence!....

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