That makes sense, and I appreciate your posting the pic. It's a beautiful little set-up. We were wondering how to do the tractor - do we include a coop? How big? How to attach it to the run? Will it be easy to move if we beef it up? Posts like yours are giving us food for thought certainly.
We actually went to Lowe's a week ago all ready to buy wood framing and 1" PVC and hardware cloth for a simple hoop tractor.....then decided it all needs more thought first. Ended up getting metal posts and plastic netting so our chicks can have supervised outings in a little 4 x 10 pen. We don't leave it unattended as it's completely vulnerable. Our coop should arrive this week and then we have to build our super-secure run.
I do love having wildlife in CT, but we have some serious worries cropping up now that we have the chickens. I know there have been bears within a mile of our house, and we have plenty of foxes. Perhaps I'll have to figure out electric fencing? Seems like much more complication. Wish we had the funds to build a second coop and run so I can separate my surprise PR rooster from our silkies and still keep everybody safe.