Introduction Problems!!! Need Help!

Hi. I have a 4 years old persian angora female, she have always been easy going and sweet when she wants, but also always haves been a bit timid. She hides a lot and not always wants to be touched. But never had shown any signs of aggresion. She have never seen another cat in her life, nor smell one ither. A week and a half a go, I rescued a realy cute cat I saw on the street, i calculate it must be 4 or 5 months old and is a boy. At first he was really scared of me, but one step at the time i was able to take it home and now he is a sweetheart. Really playfull and loving towards everyone in my house. He have's been in my room since I got it, and just saw my other cat twice as I introduced them by the door. the male was really curious but got scared bcause the female just wanted to eat him alive. It was a really scary situation.. I have never seen my female like that before. Her facd was just of pure anger. When I tried to remove her she scrashed me really bad. So I started with the blanket method, I gave it to the new boy and then to the female. And I was surprised because she did not show any kind of warning tips, she even sleept in the blanket. Then i put the blanket under the door so both could smell it and touch it at the same time, and let threaths in both sides. My female just wanted to kill the door to get to the other side, everytime she felt that the male was around she flipped. I just can imagine what could happen if the actually meet, I'm afraid that she is going to hurt him badly. I don't know what else to do. Any suggestions???                                       

@VictorRivera

Hi and welcome to TCS!  This may be a case where you will not be able to integrate these two cats, possibly ever.  But i'm going to give you the best advice I can below for introducing them, but take note that at any point this could simply fail if your resident cat doesn't cooperate.

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There are several steps to a successful introduction, the goal being BFFs, not enemies or angry at you (especially the resident cat).  A careful introduction raises the stress level in incremental steps, allowing both cats, especially the resident cat time to acclimate to the stressor before being introduced to the next level.  You are going to move the "bar" closer and closer to the resident cat until the final step, a supervised face-to-face, becomes  a fender bender and not a car crash.

Step one: Complete separation, putting the new cat is a small room like a bathroom with food, litter and water.  Do not let the cats see each other - too much stress too soon.  Give the new cat time to adjust.  Give both cats time (a week+/-) to get used to this.  They will know each other is there.  Start feeding the resident cat nearer to the door, adjusting daily until he is at the door eating. Do voluntary scent exchange by rubbing the new cat's cheeks on a sock and then offering the sock as a gift to the resident. Don't force him to smell the sock, don't rub it on him. Observe his behavior and allow it.   Rub a clean sock on his cheeks and offer it to the new cat.  Continue to do this but never force either cat to interact with the other cat's sock.

When they are reasonably calm with everything in step one go to:

Step Two:  Allow the cats to see each other.  Two baby gates stacked on top of each other in the open door is a great way.  Cracking the door open and blocking it into position so they can't get through the door is another way.  With many cats the stress of this will make them revert, but it would have been much worse if you had started with this step.  Continue as if this was step one, but now with them seeing each other.  When they are both calm, no hissing or growling, you can go to:

Step Three: After eating meals and feeling satisfied (full stomach = less aggressive) and trimmed nails, you can start to do brief supervised introductions face to face.  Watch their body language and reactions and increase their time together until you are confident that they can manage on their own.

In General, treat the resident cat like he is King.  Don't do things to make him jealous. Don't discipline either cat for showing aggression, punishing them for what they feel is a normal behavior (and is normal for them) just raises the stress.  And follow your cats' lead on the speed of the introduction, there are no rules other than to listen to them.

http://www.thecatsite.com/a/introducing-cats-to-cats

http://www.aspca.org/pet-care/virtual-pet-behaviorist/cat-behavior/introducing-your-cat-new-cat

http://www.catbehaviorassociates.com/a-simple-little-trick-to-use-during-new-cat-introductions/

Introductions can take a very very very long time.  Some cats get it right away and others take a long time.  I brought a stray/feral into my home last year.  I had a resident cat who had been an only cat for 5 years.  I took the intro process very slowly.  We had a few bumps along the way, but I thought they would work it out.  I kept moving the boys forward and ended up rushing the process.  It was a nightmare.  My resident cat was a stressed mess and the stray/feral was so territorial aggressive.  Fur was flying daily.  I was constantly breaking up fights.  I felt as though I had made the biggest mistake.  Yet, I knew I was committed to making it work.  I had to completely step back and start the process over.  I moved at a crawl.  I gave it months instead of 2 weeks.  We made progress, but it was so slow.  I kept one cat in his own room at night and when no one was home.  Then the cats were supervised at all times.  I bought a screen door at Lowes for $20 and tension rods to affix it to the door.  This allowed the cats to see each other as well as the new cat to see, hear and smell the sights of the house.  I have pictures of the screen door set up if you would like to see.

The entire process took almost one year.  The two learned to coexist, but there were still hot spots.  At the one year mark, the chasing stopped and they even were seen in the same room sleeping!!  A few things that did help were feliway adaptors.  I needed lots of them as I have an open floor plan house.  Also Liquid Composure Max.  It's a calming supplement to add to wet food.  I used it on both cats to start and then only on the more aggressive cat. 

I really would suggest backing up and starting very very slowly.  It can be done, but it will take patience and perseverance.