If the flight feathers are clipped on one wing, not both, nearly all chickens will be contained by a 7 foot fence, often shorter. The feathers need to be clipped after they molt though. I have some breeds that fly very well and this stops them from getting over the fence.Yeah. The coyotes here are pretty comfortable. It is a wonderful area for them. Lots of small game and wild woods around little open fields with sparse housing and roads. Perfect for deer, coyotes and hawks.
Gust is an indoor dog, a companion animal not a guard dog or hunter. The hatchery birds and their mutt offspring in the free-range flock will not stay confined no matter how tall we make their fencing.
We have a more permanent immediate solution for the Coop Coyote. Eventually we'll extend what fencing we do have to come up against the house in the front. I predict at least some hatchery birds will still let themselves in and out. But the Delawares seem to stay on the right side of fencing, which is one thing I really appreciate about the breed.