One of our cats was run over this morning and killed outright ... do we try and find a way of explaining this to our ds or leave it until he asks where she is. He is closer to our other cat but will definitely notice she is missing. We had only had her a year and are now faced with a decision as to whether to keep just one cat for fear of another one being run over as we live on a pretty busy road (but the remaining cat cries and howls when left on his own at night which was our main reason for getting the second cat in the first place if I am honest) or whether to replace straight away. Any ideas?