also this is strange but I have seen it happen... When you are still in mourning of a cat who has passed away, if you get a kitten while still mourning your old cat, it will actually pick up on certain traits from the last one. It is kinda creepy but so cool. My mom's friend had to put her cat down a few years back and she got a kitten a month or so later. Her cat that put down did this wild thing where she would take her favorite toys and line them up in a straight line and always in 3's. Well, the new kitten started doing it around 8 months old and still does it to this day! its pretty cool.