We just adopted a sweet kitten amonth ago. After getting over a bad head cold, she is now showing her true personality. For some reason she marks my sister's bed and chicken's crate - she's fascinated with them. We do have an older fixed male cat that does not mark - and to the best of my knowledge still doesn't. I thought that female cats didn't mark. She is an indoor cat with her own litterbox, food and water dish in another room from our other cat. What do I do? Is this normal? Ever have a female kitten mark? She also has a thing for cardboard. Likes to chew on it. She just went to the vet today She is as healthy as a horse.