Updated On September 23rd, 2025
Pet's info: Cat | American Shorthair | Female | spayed | 3 years and 5 months old | 12 lbs
What else can I do to get my resident cat to get along with my new cat. It's been over 3 months & there're still standoffs w/hissing, growling & chasing. My new one pursues the resident cat relentlessly. Both are females, 3 yrs & fixed. They both have their own food, water, litter boxes & toys. I kept them separate for the first 6 wks & slowly intergrated them. I tried calming collars & the infusers. I can tell my resident cat just wants to be left alone. I feel so bad for my resident cat Chloe.
4 Answers
Published on December 31st, 2016
I'm sorry to hear that you're having so much trouble! Some cats, just like some people, may simply have incompatible personalities and may never make good housemates. It sounds like you have done everything right so far and given them plenty of time to adjust, so this is definitely a challenging case! Because of this, I would really recommend making an appointment with a veterinary behaviorist if you're committed to keeping both cats. He/she can evaluate both cats in person to help determine why they're having so much trouble getting along, and will put together a detailed plan for you to address the problem - this may include management recommendations to ensure that both cats are comfortable, training exercises you can do with them that may help, or even medication for one or both cats if necessary. You can search for a board-certified veterinary behaviorist in your area here: www.dacvb.org
1Pet Parents found this answer helpful
Published on May 14th, 2017
I'm sorry to hear that you're having this problem! Unfortunately, this can sometimes happen - cats who got along well as kittens may not like each other much once they both reach social maturity. So it's possible that they just may not be compatible housemates, sadly :( If you want to see if this is something that can be worked out successfully, I would recommend making an appointment with a veterinary behaviorist who can evaluate both cats in person and help you understand why they are fighting. He/she can also put together a detailed plan to work on the problem, and may also recommend medication for one or both cats to help with the aggression. You can search for a board-certified veterinary behaviorist in your area here: www.dacvb.org
1Pet Parents found this answer helpful
Published on December 22nd, 2017
Dominance is complex and unfortunately, there is no timeline for when that happens. You can also have a situation where the cats simply do not like each other (just like it happens with people sometimes). If it has been going on for a long time, I would be afraid that is more likely the cause. You can try a pheromone diffuser, special Prescription Calm Diet food by Royal Canin, providing tall cat trees with hiding areas on the top and you could even talk to your vet about trying Prozac on Batman. I hope this helps to give you some ideas to create peace in your home. Please post again with any further questions.
1Pet Parents found this answer helpful
Published on April 26th, 2017
How frustrating! Cats can be very hard to "read'. There is almost certainly a reason for the fighting, but it can be very hard for us humans to notice what the reason was because we don't speak Cat. I recommend separating them again, give them a break apart for at least a week, and then restarting the introduction much slower this time. If you introduced them over a week before, do it over 3-4 weeks this time. If you took a month to introduce them last time, take 3 months now. Some cats need a LOT of time to warm up. When you are introducing them, only let them interact or be in the same room if they are both completely relaxed. Often feeding both cats, on separate sides of the room is a good way to start this process. If you try again, and they still fight, I recommend getting in touch with a veterinary behaviorist right away. The more they "practice" fighting, the harder it will be to ever get them to stop. Some cats even need to be on medications in order to get along.
1Pet Parents found this answer helpful
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