I can't see a grown cat taking to a lead or for that matter a cage, i know my 2 would raise living hell if i tried it.. I'm quite lucky that my 2 are by and large pretty unsuccessful hunters but fledgling time is always their 'lucky' time as it's the only time they seem to catch anything at all most years.. with mine the dawn and dusk thing would be no use as he (my girl has only ever caught 1 bird in 9 years and that pecked her so badly she had a hole in her cheek and I think broke a tooth in the process too so I don't worry about her catching things, only the damage they inflict on her.. ) seems to only catch birds in the middle of the day! he has however caught 2 bats in his time which is sad but strangely impressive (he's like zebedee, he doesn't stalk anything as far as I know, just sits there till they fly past then springs about 4ft up) as I would have thought they would be very hard to get with the ecolocation..?