Ive been raising chicks lately and had crows take the occasional day old or week old chick, which wasn't too much of a problem but today two pairs of crows killed one of my 6 week old cockerels. The crows have now learnt they can eat larger chicks which is a huge problem. I also cannot kill off all the crows as they keep the eagles away from our chooks. Does anyone have any ideas, would maiming or killing just one of the crows do the job, or is there some other way which would work?