As a matter of fact, they do. But then I am maybe more used to the "squabbliong" that goes along with any family. When my friend comes over and hears the loudness made by the cats play/fighting, she always worries that they are hurting one another. I on the other hand, know better. The only *screaming* that bothers me is when Sterling (or any other cat) goes after Fern. They mean no harm, but she HATES them. So I yell at them to leave her alone and go play with someone else.