As to how much noise two cats can make...it is alot...I had this problem with Tex when I lived in Mass. The guy was nice about it, but, he did tell me how noisy it was. I got into the habit of removing my shoes as soon as I walked in the door..at least I could eliminate my noise.

Soledad- I think the best thing to do is talk to the lady. Let her see your problem. Everyone is more tolerant of people they like. I would try the carpet runners, and in time, they will settle down....maybe in a year! Good luck.

Maybe you can begin looking for a new apartment?