I know the meeping sound! You're right, you can never tell which cat is making it!

Sounds as if things are progressing nicely. We had no trouble introducing my two guys, but I think that was because Pouncer so small. We let them meet face to face for a few mintues a day for about a week and then we let them interact only during supervised visits. It wasn't too long and Allen because a surrogate mom to Pouncer (aww)