I have buzzards too. Bold and beautiful and just waiting for me to let my growers out too soon. I keep these in a covered pen until I judge them big enough. As to foxes I had a fox-proof (so far ) pen built. I don't think of the cost, it took a very large portion of my deferred pension

and consists of much deer fencing, barbed wire and concrete but I can sleep at night (if I weren't working)

knowing that my hens are safe.
My whippets account for a lot of cubs in late spring/ early summer and the hunt, at least, scatters the rest.
BUT!! I know that a lot of hand-reared cubs are released around us. They are so different to wildies that they might as well have a collar and tag. These are the ones who will sit and look at you as if weighing up whether you may offer them a meal. I'm afraid these are the ones dispatched by my dogs. Why aren't these cubs put down, first as last.
Then there are the urban foxes, trapped and released into the countryside. Poor thing haven't a clue and gravitate to the nearest village or town to search for food, pet rabbits and chickens always available

Why can't the R.S.P.C.A. and other well-meaning organisations realise all this?