I have an old dog pen I was going to use with a chain linked fence. I was going to wire the top with some 2" wire that someone gave me for free. 1) Is the 2 inch on top okay to use to protect my feathered friends from cats, birds, coons etc? 2) Do I need the 1 inch or 1/2 inch on top? Can I use the 2" as a bib for diggers? 3) I'm thinking I need to wire around the linked fence too. Would zip ties work to attach the wire to the chain linked fence? Thank you all!