How to stop a cat's hunting instinct
So it's spring, our yard is full of bird's nests and our cat (female, 3yrs old, sterilised) is fully fixated on killing them all. She is an inside cat, who is sometimes allowed in our private yard. Not anymore obviously, cause she keeps hunting them. But she didn't forget. She spends all day trying to escape and meawing in front of doors and windows. So it's been stressful. She fucking bolts every time she has an opportunity, stands under furniture next to doors so she can try to fool us, and when she succeeds she immediately runs to the spots where she knows are nests. We get her to come back with treats. I fear it won't work forever.
We cannot get this killer to rest, she hears them chirping from outside and already gets angry.
She's always been like this. But this year's worse than ever, we used to have 2 cats, but the older male one died very recently. Idk if it's related. She has lots of toys that emulate the hunting, but they don't stop her from the real thing.
So we don't know what to do anymore, I'm here to ask for suggestions to get her to calm the f down a bit. It's like living with a prisoner who's constantly trying to bolt, we have to first lock her in a room to get out, it's not that fun.
Any suggestion or help is appreciated.
No need to tell me cats destroy the environment, we're well aware, that's why we're trying to solve the problem, we do care about saving these poor birds.