Start by getting the other female spayed, too.
Then..you will have to give it time. It takes time for all the hormones to leave the body.
Once all cats are spayed and neutered, treat her like a new cat, and reintroduce her to the household in a gradual way, using scent exchanges, (rubbing things that smells like you on each animal so they all smell like one another) and limited face to face contact.
Make sure you have enough litter boxes (four, for three cats) and enough elevated space so all the cats can be perched somewhere up high at any given moment.
Oh, one more thing you can try, once the final cat has been de-sexed. Some people swear by the Vanilla trick. this is putting a dot of vanilla (cooking vanilla NOT perfume) on the nose, chin and root of tail of every cat. This makes all the cats smell the same to one another, levels the playing field.
But the very first thing to do is to spay the third cat.
Then..you will have to give it time. It takes time for all the hormones to leave the body.
Once all cats are spayed and neutered, treat her like a new cat, and reintroduce her to the household in a gradual way, using scent exchanges, (rubbing things that smells like you on each animal so they all smell like one another) and limited face to face contact.
Make sure you have enough litter boxes (four, for three cats) and enough elevated space so all the cats can be perched somewhere up high at any given moment.
Oh, one more thing you can try, once the final cat has been de-sexed. Some people swear by the Vanilla trick. this is putting a dot of vanilla (cooking vanilla NOT perfume) on the nose, chin and root of tail of every cat. This makes all the cats smell the same to one another, levels the playing field.
But the very first thing to do is to spay the third cat.