I can't speak for all cats but I have cared for rehabbed and tamed many many ferals. In fact 4/5 of our current cats were ferals the other was a mostly feral barn cat.
In the town we lived in at the time we would have 6-16 ferals in our back yard at any one time. We fed them and gained their trust and then found them homes. Now feeding cats will make them stay however when we had 12+ cats in the back yard every day that we kept fed we also had robins and other birds as well as rabbits groundhogs and squirrels all on our back deck at a time. It was rather odd and always put me on the mind of Eden. Lol my point is though I can't be sure about the chicks and I'm sure they would probably eat a pigeon if they could but if you feed them and keep them fed and give them boundaries cats are pretty awesome and will keep them generally. Yes our ferals would occasionally playfully chase a bird but they never tried to put much effort into it. They didn't need to lol. I will however say that our year old kitty, Luna that I've had since she was a day old has more natural instincts than I've probably ever seen in a hand raised kitten and given the chance she would definitely kill a chick.
I recommend watching her and seeing if she seems curious ignores them or acts more predatory towards them.
In the town we lived in at the time we would have 6-16 ferals in our back yard at any one time. We fed them and gained their trust and then found them homes. Now feeding cats will make them stay however when we had 12+ cats in the back yard every day that we kept fed we also had robins and other birds as well as rabbits groundhogs and squirrels all on our back deck at a time. It was rather odd and always put me on the mind of Eden. Lol my point is though I can't be sure about the chicks and I'm sure they would probably eat a pigeon if they could but if you feed them and keep them fed and give them boundaries cats are pretty awesome and will keep them generally. Yes our ferals would occasionally playfully chase a bird but they never tried to put much effort into it. They didn't need to lol. I will however say that our year old kitty, Luna that I've had since she was a day old has more natural instincts than I've probably ever seen in a hand raised kitten and given the chance she would definitely kill a chick.
I recommend watching her and seeing if she seems curious ignores them or acts more predatory towards them.