Thank you so much! This is very helpful. I read about the sock/scent method in the link. Should I rub a sock on the other male cats and introduce them back to Gray Baby?
We have 2 spayed females and 3 neutered males. The little boy cat, Gray Baby, is about 3 years old - the rest are about 2 years old. They all got along very well - Gray Baby would play and cuddle with all the others. He was a sweet and affectionate cat. The rest of the kitties are as well.
BUT...