So we have two female house cats already, in February this year a male stray started to come into our garden, we began feeding him as he looked scrawny and was very adolescent. Our cats took a shine to him, he is so adorable and has an amazing temperament enjoys being held and loves playing, so we took him the vet to see firstly if he had any owners (he didn't) so we got him neutered and vaccinated, night him back to the house and he stayed with us mostly in the house, except at night when he could go crazy to be let outside, but would sleep on the patio chairs and rarely wonder out of the garden. This habit went on up until 4 days ago, when I let him out as usual but this time he wondered off, I haven't seen him since which is odd as he seems to have gotten used to a routine where he would be back on the doorstep each morning awaiting to be fed. There's plenty of things that could've happened I know. I've gone out looking for him but no sign, the one thing in his favour is his strength, since we have fed him well he has grown into a huge and even muscly cat (like a tiger to pick up). However he has awful balance for a cat, so I'm worried he's fell off something or even that our female cats got on with him have chased him off, as sometimes the one of the cats hisses at him. They're old and he's young so he just wants to play when they want to sleep. Hope he comes back.