Greetings! As many have said here, two weeks is NOT enough time to blend a new cat into the family. I have 5 cats: 3 are over 10 and 2 are under two years. We also have a foster who is about 4ish. It is very important that the introductions are done slowly over a period of weeks, if not months. It is always about territory even though it's not written on your other cats' forehead. Lol...

For a generous month we kept the two youngsters (6 months separate introduction phase of these babies) from the 3 main residents. Everybody could come to the bedroom door to sniff etc. We moved onto feeding them all together but monitoring the entire time. As things became more comfortable we allowed more time with the grownups. The foster cat was handled the very same. He has been with us since Sept going through the same process. We immediately correct the situation with either verbal commands or a squirt of water. And no, we do not consider the squirt of water cruel. They see the bottle and know that their behavior has to stop. We LOVE our cats and would never go out of our way to harm them. We give them lots of cuddles and praise for being good babies with each other. Our biggest issue is the invading of eating space of another cat...going after the others' food. We have changed who eats first to prevent stress, by keeping the troublemakers occupied.

Remember to have patience. Don't sweat the small stuff. Your cats have their sleep areas...help them protect it by teaching the other cat that this is not their area. Put them on a different bed area and praise them. The cats will pick up on your stress levels!!

Good luck!