Just to clarify...I don't net my whole property, as that is not feasible...but I have found that strategic netting and strategic placement of streamers has been a very effective deterrent for hawks and birds in general.
Good luck to the OP, I do hope you find the right solution for your flock...
I do net, and I do remove my fruit...and I do not have flocks of birds in my trees, or in my yard with feeders, though my neighbors do. It's simply what I can do to help minimize the risk.
LofMc
Which is why I don't encourage wild birds to come into my yard by hanging feeder stations or other things that will attract them or encourage them to stay. Yes, they fly by and through, you can't help that, but encouraging them to hang around in groups by my flock is not something I personally...
I personally wouldn't encourage crows to hang around my flock. Being wild birds they will bring in all manner of disease.
I have a lot of hawks where I live, and I've had a few hawk losses.
I would recommend getting another rooster, getting another dog, and/or hanging hawk netting up...