Hi Anon. I have three cats and three ferrets, and they all get along wonderfully. One of our cats ALWAYS gets attacked my Bongo (our middle ferret), and we were worried about it at first. But we notice that our cat really didn't care that much. When it got to rough, our cat put Bongo in her place. After a month or so, we realized that Bongo was training two of our cats to play her way. Now, Bongo chases our cats and the cats chase him around the house. Our oldest cat, though, will not have anything to do with the ferrets or the other cats. He is king of this house, and only his owners get his love. The reason your ferret keeps jumbing on your cat is because that his only playmate, and he is going to train that cat to play his way just like they train humans to play their way. The most you can do is teach him not to bite by using Bitter Apple. As far as litter goes, ferrets like litter boxes that they can get into easily, without waiting for a cat to finish. Ferrets, also, should have a smaller amount of litter in their boxes, because they will play in litter boxes with to much litter. Ofcourse, you do only have one cat, so maybe you could get away with one box. Also, you might want to check what kind of litter you are using, because not all litters are good for ferrets. I hope I helped. Kimberly and family [Posted in FML issue 1030]