I'll play...
bought the plans online for $20 from http://www.thegardencoop.com. We modified the plans to make it bigger.
Good luck, I know from experience that the planning for chickens and a new coop can be overwhelming. It will all be worth it in the end.
There's always going to be another predator coming into an area. Short of living out on some small private island without any predators on it you'll always have to deal with them.
Pictures of your set up would be useful. With a tractor, you'll want to move it often anyways. I usually try to slide mine at least 2 to 3 feet a day just to keep things moving along. Mine's heavy enough that its not easy to move.
We're city folk and don't have a rural setting other than the foothills and mountains about 2 miles behind us. The foothill folks get deer, coyotes, occasionally a bear, skunks, rattlesnakes, raccoons, oppossums, rabbits, stray dogs, feral cats, lynx, etc. My DD & SIL capture these beasties on night camera but they won't kill or trap them. I think they are playing rouette not to actively deter wildlife. A 6-ft iron fence isn't secure in my mind but then it's not my property. But we down in the suburbs don't have any wildlife other than rats, mice, raccoons and 'possums so we don't "Shoot! Shovel! Shutup!" as rural folks might do. We are relieved when we see roadkill on the street - especially raccoons - but most of the time it's either a possum or feral cat. I think the humane societies in different areas supply Havahart type traps but we've never needed one for the city beasties in our neighborhood. Folk like perchiegirl have better advice than me for country properties or rural areas. Her advice for electric fencing around a chicken area sounds good to me. Just be certain you have it turned on! I read many folks who swear by this fencing.
