Karen, I have heard that coyotes can scale a 6-foot fence too, so be careful even with a fence. I am sure that it will be a deterrent to them though.
Oh, I know, but as you said, it is a deterrent. Fortunately, we have neighbors whose chickens are always loose, and when they AREN'T loose are only behind plastic mesh. SO I figure if they are after an easy meal, they'll tackle loose chickens before jumping (or climbing) a fence.
Kodi is good about staying close, but I want him to be able to enjoy his yard freely, just because he IS good and trustworthy. I'm not really worried about hawks…. when he was a tiny puppy, yes. But he's much too big for that to be an issue now. But we DO have coyotes in the woods right beside our house intermittently. They have a very large territory, and range far and wide. Fortunately, we have a good "early warning system" among the people in town with dogs. We let each other know on a regular basis where the coyote pack is.
The other good thing is Kodi is smart enough to be very wary of them. He won't go out, even on a 6 foot leash, with me, if we can hear the coyotes, and there have been a few times when I didn't see or hear anything, but he was obviously reluctant to go out. Since he'd MUCH prefer to go outdoors, I always take his word for it, and we use the indoor potty at these times.