Today we found a little baby outside, it was so thin, maybe it born on streets; we just can't let him outside and for that we decide to adopt it... BUT! I have 6 more cats at home and it's a big problem, the others attack the kitten, then which one is the best way to introduce a new cat at a place with other?

This may take time but it is better for our cats do it this way; remember, for cats they prefer to be alone most of time.

1st- Never let the new one go around alone in the house and surprise the others with the new smell, I bet they'll attack for sure!
We need to choice a room for the new one, it'll stay for a while inclosed here with water and sand box. (if you don't have an extra room the bathroom is a good place to do it.)

2nd- The residents of the house will notice the smell almost immediately and they'll go to investigate; a positive way to associate the smell of the new cat with something good is playing and feeding them near the door.

3rd- A few days then, the next step is to enclose the new cat in another room and let the residents explore the closed room (They can't see each other in the progress!), we need to act normaly, talk with them as always, but avoid touch them for the moment. If we have more than one, let them to do it individually.

4th- Again, let time pass a little more until see a better temperament in the residents to "the new smell". If they act normally, it's time to get to know a little.
Put the new cat in a safe place where the residents can see him but not to touch. If you see an agressive act, separate them and give them more time repeating this exercise until they can tolerate each other.

With this, we can include a new cat in a home with more cats living there in a safe way.