had 2 guys try to rehome their cockerel by throwing it over the allotment fence much to my astonishment...it could not stay so.......
some people will do that, either they do not want them or something is amiss. you could let the local police know and if local radio does annoucments as ours does.
Definitely keep the chooks apart as these might have an illness.
Sorry about the cockerel....had to home mine as hubby moaned.