i recently adopted two cats (ages 1 1/2 and 2), one boy and one girl, from a foster home. They seemingly adjusted well over the last month but all of a sudden, in the last few days, they appear to have completely traded personalities. The one that was reserved and only liked attention when she initiated it has now become extremely outgoing. The one that was friendly and my little "love bug" now hides under my bed and behind my couch. He is not all that receptive to attention. What is this and how can I deal with it? It's worrying me.