We recently acted as foster parents for a two month old kitten rescued by the SPCA. While our own cat (adopted from the SPCA in 2008) did not take kindly to the presence of the intruder or being denied access to part of our apartment, the experience was a good one. As expected, he spent most of his time hiding (either behind our bed or under a cabinet) and would bolt for cover whenever anyone came into the room. At night we could hear him running around, scratching furniture, unravelling the toilet paper, knocking things over and generally having fun. By the end of his stay it took very little effort to coax him out from hiding to play. I was tempted to keep him, but decided that it will take more work to get our own cat used to the idea of sharing her territory.
Yesterday I received a call from the SPCA to say that he had been adopted. Yeah!
Definitely an experience that was enjoyable and will be repeated.