Cat B (1 yo) Will Not Respect P's (2 yo) Boundaries, Please Help
Hi, I have 3 cats: M (3 yo), P (2 yo) and B (1 yo). I started out with M and later adopted P, and they get along swimmingly. M has always been a very sweet cat and took to P immediately, and P also is much in love with M. They have been siblings for a year, going on 2 years at this point.
I took in B from my uncle for the time being (my uncle had her unspayed with her 2 unneutered brothers. Aggravating. I wanted to get her out of there before she got pregnant, but she did get pregnant and I was able to safely get her spayed and the incest kittens aborted). I have had her with me for around 5 months now, and have not taken her back as I am not sure my uncle would even properly reintroduce her to her brothers and I do not have the time or bandwidth to do it for him. Another reason is that she is a sweet girl and I just love having her around.
Except for the fact that B is constantly pushing P's boundaries. P is a Domestic medium haired tortie, and B is a Domestic shorthaired calico; I don't really pay too much attention to cat coat stereotypes, but the catitude might be there? Anyway, I took the time to introduce them all to each other: B was in the bathroom for nearly a month (2 weeks, I believe, to get her spayed and tested, and another 1 or 2 weeks to get them used to each other). P and M were more than happy to welcome her, for the most part- P tends to be a bit more shy, and B, after getting spayed, was much more lax. They will all cuddle, groom, sleep, eat and the likes around each other. I have seen P and B grooming each other, sleeping next to or on top of each other, and just generally getting along.
However, B pushes P's boundaries. P will run from B, indicating she's had enough, and B will keep pushing; running after her relentlessly. B is the chaser more often than being chased. Even when P hisses, B will not let up. I usually try to break it up if they (more than likely) haven't done so by physically separating them or throwing a toy, but I can't be home to do this every time. I play with them all around 30 minutes when I can (though, it feels like the playtimes just rile B up more and lead to more boundary crossing) or by throwing toys (B loves to fetch) throughout the day. B is still so young, so I'm hoping she grows out of it but I also don't want P to have to deal with this for longer.
M is a dumb, ever purring, Domestic long haired tuxedo and gets along with both of his sisters well. B has gotten him to hiss more than he used to, but they do not run into the same troubles because B backs off when he hisses.
Should I try to reintroduce them all to each other, would that even work when they've been around each other so long? Should I grab some calming diffusers? Play with them more?