Fledgling

Carol rescued this little bird (great tit) from three magpies a couple weeks ago, it's eating drinking and growing it has one eye and after several attempts to help it it just will not or can't fly . . Really I guess we should have let nature take it's course but hard to watch in your own garden so it now lives in a bunny run seems happy enough bobbing about and jumps into the pet carrier if it feels threaten'd Not sure if we are cruel or kind really
Thoughts?