I have never had a cat bring me”gifts” but my neighbor’s cat left a cardinal by her pillow..Perhaps the adult bird attacks will discourage Kitty Mittens..He probably survived earlier with hunting.
I watched a neighborhood cat slink past my patio, bird in mouth earlier this spring.
I love birds and cats..and cats will be cats. Hope he connects loss of outdoor access with bird catching..Good luck.
I don’t know if we can change him. Cats are basically hunters and he thinks he is doing great.
If he were catcing adult birds, I wouldn’t mind as much but ..... I hate the thought of him taking the babies out of their nests.
It just doesn’t seem sporting! ;^ )