I'm new to this site, but I could really use some feedback... I have 2 cats: a 2-1/2 year old male (ginger tabby/tiger) and a 2 year old female (all white), both are fixed....they get along fine and are very loving & playful with each other, and very friendly towards people (even strangers, though my little girl is somewhat more shy)... we moved into a larger unit in our apt. complex a little over a month ago and have had some problems with a neighbors cat... he keeps coming into our patio and is somewhat of a bully... I know that he and Henry have gotten into it because I've treated Henry's scratches on a few occasions.... so far it's been nothing too serious, but today things took a disturbing turn. a neighbor of mine who just moved in about a month ago has two cats, also a male and female pair, both fixed... they have one of those pet doors that fits into the sliding glass door, and it seems that they are in the habit of keeping it open... they have found a "very aggressive" cat in their home harassing their cats at least twice now... and on friday morning at 6am their female cat was mauled by the intruder (she's ok, stitches and some antibiotics...but scared and battered nonetheless)... I discovered this because my cat turned up missing this morning... it turns out that the neighbors put out a trap... Henry got caught and is now sitting at the city shelter where I will have to go and bail him out in the morning.... she is pretty convinced that the cat she caught in the trap is the offender, but the vet told her that her cat's injuries looked like the work of a whole tom.... and the cat that has been bullying Henry is also an orange tabby, he's just a little bigger and with more white... and he's been known to claim that area as his turf too.....I've seen Henry hanging out around that general area, but I'm almost positive that Henry was not out at 6am on Friday (they sleep with me, and only rarely manage to spend an entire night outdoors), but I can't rule out the possibility either.... I'm pretty certain that this other cat is the culprit and that Henry just managed to be in the wrong place at the wrong time (he's curious and active and a complete doofus with a nack for mischief).... but am I just being niave? Is it possible for a neutered male who cohabitates peacefully with another cat and does not exhibit aggressive behavior in general to wreak this kind of havoc? (she said the cat was spraying and everything and that they couldn't get close enough to even try and read a tag)....the cat I've been having problems with wears a collar and tag, but I have never gotten close enough to know if it's neutered or not.... sorry this is soooo long, but I'm at my wits end.... is this mistaken identity or is my cat possessed? am I looking at a future of paying other people's vet bills? (they have put chicken wire around their patio, so hopefully whoever the psycho kitty is will not be able to harass them again).... help! any thoughts? words of wisdom? Again, sorry this is sooo long!!!