I took in what appeared to be a stray cat a couple of weeks ago. He was ravenous, coat unkempt, ear scratched raw with ear mites. I took him in so we could treat his ears. I've postered the area, contacted local vets, listed him as found on rspca site, animal search, local pet owners forum, facebook, everywhere I can think of. And of course kept checking lost pet ads. He's not microchipped and no sign he's ever had a collar. He's neutered and very friendly though.
At what point would people think it was ok to start process of trying to re home him?