But...
Glad your boy is still doing well with the flock!
On hawks...
We were having so many for awhile especially during the fall time. We have many towers in the area where they like to sit and look for prey. I lost one bird in 2013. Have had times, like you, that I would lock them in the run.
One of the things that the DNR recommends using is "bird bangers". They are a "scare-tactic" pyrotechnic gun that shoots either "screamers" or exploding shells, or both. They are fancy-pants "noise-makers" that are meant to scare the hawks from the area.
The hawks around here were so bold that they would sit 6-8 feet away from where I was walking and just look at me. I'd sometimes walk right close to them, shaking my finger menacingly (
) and they'd often just sit there looking at me like they owned the place. I imagined they were wondering why I didn't JUST LEAVE and let them have their lunch. We're their main predators and they are no longer afraid of us, unfortunately. While I have a bit of land, there is residential all around and very close on all sides and some possible actions I could have taken wouldn't have worked well.
I decided that I'd try the bird bangers and I've been glad I did. It makes me feel like I have at least some control on the problem and really has worked quite well.
When I first got them I wanted to fire when I was hidden because I wanted the hawks to be afraid of the area rather than afraid when they saw me. I was never able to pull that off well, but no matter. They seem to work pretty well anyway. We do have hawks in the area but when I use the bangers, they stay away for longer periods of time. I try to remember to carry shells and the launcher in my pockets if I'm working outside so that I can use them as needed. If I'm inside and I hear the warning I can grab them and shoot in a moment's notice when I'm home.
Not sure if they'd be appropriate in your situation but just in case, sending a link. I got the double-shot launcher. If you have a 12-Guage you can get shells that fit those instead but have to have a permit for those I think.
You have to fill out a Wildlife Control Statement to obtain the ones I got. Not a big deal. And shipping is expensive because it ships hazmat explosives. Ship cost is the same if you purchase 20 items or just one, so if you decide to purchase, get a supply of shells and/or screamers at the same time.
Double shot launcher:
https://reedjoseph.com/products/pyrotechnics/double-shot-launcher/
Shells:
https://reedjoseph.com/products/pyrotechnics/bird-banger-100-round-box/
Screamers:
https://reedjoseph.com/products/pyrotechnics/screamer-siren-100-round-box/