I know this has probably been gone over a million times before but this seems a bit of a different case than what I've read. And I've had many cats before so not a newbie. So in the process of trying to live trap our cat that got out we ended up trapping what ended up being a male cat not once but twice(first time let him go). All the shelters being full and foster being full in our area we took him in and set him up in the bathroom. Brought him to a clinic to get all his shots, dewormed, de-flead, etc, etc and set up for him to get neutered. Well ..... But he has an odd behavior. He loves being pet and will roll over, purring, is very vocal etc but at times will turn and bite and I mean bite hard breaking skin but then immediately run under the sink. I thought maybe over stimulation which is the most common but he's done it when not being pet as well. He's taken swipes as well. It's just weird. Over stimulated would be the most common but as I said he's done it when not being pet so we're confused. Pissed at being locked in the bathroom? We'd let him out but we just don't know how he'll be with our cats now and we don't want him spraying everywhere until he's neutered.