I need some advice from the experts. I currently have 9 cats. After fostering 2 wonderful Maine Coon brothers my DH and I have decided to adopt them. We let them have free roam of the house today and came home to find someone had marked on the bed and floor in my guest room. I am guessing one of my current cats is unhappy with the new boys. All cats have been neutered or spayed and everyone is in good health. What is the best way to integrate the new boys into my current furry family?? The new guys are very laid back and sweet. They are not alpha in any way. Help I need your advice!