Becky Mundt wrote: We only have 10 chickens, but they have a movable rotating around a central house for our convenience - but they get fresh area all the time because the ben is 300 feet of electric fence and we move it every 30 days - we actually rotate it in a series of moves over a full year and then start all over! They have fresh beautiful forage all the time.
As for a LGD taking out a hawk, that I also doubt, very very seriously. But may be I am wrong, can you show where this has happened, ever. Not to some tiny crestle either a big old Redtail or Ferruginous Hawk? I see even a large dog seriously ripped to shit if it manages to engage with such a bird.
I also do not think your tree argument is strong. Are there trees inside a tractor, no. But I run tractors right in between and under trees. All the windfall is still available to the birds.