My older cat is acting mean. See details......?

My younger cat (she is 2 years old) just got fixed on Tuesday. My older cat (she is 4 and fixed) is acting so mean to her suddenly. She has been acting this way ever since the younger one got back home. My older cat raised the younger from a kitten and they were the best of friends until they were separated for 24 hours. What can I do? The younger one is still tender and very apprehensive around the older one with all this hissing going on. Im really worried here. Im trying to give both of them equal attention as always. They both know they are very loved. But this hissing from older to younger is just not right. Any advice?

Serious replies only please. If you cant give a logical answer then I would prefer no answer at all.

Thanks.

2008-07-24T14:44:32Z

Please use spell checker. If you cant spell then please dont post. I need to able to read what you say.

2008-07-24T15:07:50Z

I want to thank each and every one of you for responding. You are helping me so much and I want to give all of you the "best answer" button cause you all deserve it. You dont know how much your advice means to me. Thank you a million times over.

Anonymous2008-07-24T14:46:46Z

Favorite Answer

Yes, the other posters are correct. When a cat goes to the vet or has an operation, their scent completely changes. My four cats all hiss at the poor guy who gets home from the vet for awhile. Then they settle down, the scent becomes normal again, and they get along again together. Just give them some time and they will be okay. You could try and rub something on both of them... a towel, a dryer sheet, a piece of your clothing, so then they both will smell the same way. Good luck, and thank you for being such a loving cat parent!

Anonymous2008-07-24T14:38:22Z

Im almost positive the older cat is hissing because the younger cat still smells like the vet from being fixed. Whenever we bring one of our cats to the vet and bring it back, the other hisses and gets very alert. Give it a few days and it should calm down

Anonymous2008-07-24T14:40:01Z

The cat you took to the vet has changed scent...you have to reintroduce them all over again. Get something the younger cat slept on (without the other cat), and rub it on her. It should help the older cat recognize her.

Anime-tastic2008-07-24T14:39:30Z

i would try and keep them seperate. when you get into more then one same sex cat in the house they tend to get agresive and teritorial, they may be fixed but the instinct is a big one in cats thats hard to over run. If you dont want to keep them seperate then when one attacke sthe other take the "attacker" and put him by himself for a while. after a few weeks of doing this the cat should reoloze that when it attacks the other cat it gets banished from everyone else. Good Luck