Ok pooping problem... more info...

Ok I had posted earlier that my kitty has a problem pooping right outside her litterbox (the box is big enough) for about 2 months, and i've only had her for 3. i thought it might be behavioral because she has to stay in my room all the time because she will attack my rommate's cat and dog, mostly the cat is the problem. I thought she was mad when I left but she's done it three times when I was in the room now. I got her a second litterbox with a different kind of litter and she pooped in the new one for the first 2 days, then stopped. i dont know what else to do, and i need help. i brought her to the vet a week after i got her, which was 3 months ago and she started this 2 months ago so i dont think she is sick. not sure what to do... if you could help, i'd greatly appreciate it. Thanks in advance.

I would defiently take her back to the vet. She might have worms and that could be what is causing her not going in it. There are three types cats can get and tape worms are the ones that come out in their poop but they can also have two other kinds that don't come out like that. It could also just be her aim, or it could be because she was spayed too soon....it could be any number of things, but I would defiently take her to your vet.