We've had a very skinny cat visit us several times in the last month or so
I think it's a stray as I've advertised it as found on our neighbourhood FB page and Neighbourhood Watch and nobody's claimed it and it's v scared of people - can't get near it before it runs away
It got stuck in our spare room for at least two days and nights a few weeks back and nobody reported it as missing, although I'm aware it's not unusual for some cats to bugger off for that long and then come back
He/She's taken to visiting our cat late at night and yowling for him and playing with him (or trying to!) but twice now she's sat on the patio all night waiting, even in the rain 
I don't want to start feeding it in case it's someone's pet but other neighbours have said it waits in their gardens too and it's very very skinny. Can't think of what else to do other than try and coax it into the house, shut it in and borrow my friends scanner to check? Less traumatic than trying to wrestle to the vets or trap it? Any advise welcome!