I've had my girl since she was 2 months old and she's now 2 years old. Never been a biter towards me, but is very domineering towards one of her sisters. The first time she bit I assumed she needed a wee and was telling me for the first time. Then she continued biting my clothes every time I picked her up and I started to get worried about her. Then she had an entire day of chasing and mounting her sister. I know I should take her to the vets but I'm worried it's ovarian cysts in which case its surgery. It's been under a week of biting me but it was one day of domination towards her sister.