Mine free range sometimes but usually just for a few hours before bedtime when it gets dark and when I can watch them. That might be your best option. But I've never had an issue or I should say minimal. One attempted hawk attack last year but they only got feathers, no injuries, and most recently, a few weeks ago, the neighbor's dog got loose and got one of my hens but she too was fine, mostly just tons of feathers and one small scrape. We have also had a fox visit very early morning/late night when they were still locked up. Predators are just something you have to deal with with chickens and imo, I don't think the predator risk is enough to keep mine locked up all the time, it's not fair to them. Mine LOVE getting out, even if it's just for a couple hours or supervised. And supervised there isn't much risk anyway. You just have to decide what you could live with. I only have 8 and mine are pets (and of course eggs) so I would, of course, be devastated if I lost any but like I said, I don't think it's fair to keep them locked up. But I have only recently come to this conclusion. They were locked up for months. If they have a big enough run, bigger than recommended, and things to do so they don't get bored, keeping them confined might be fine but mine don't have that atm. But soon.