If she seems to be in distress generally it could be worth a visit to the vet. The fact she's able to hunt down rabbits indeed makes it sound like there's not much wrong physically, but you never know - sometimes small health problems have odd complications or behavioural consequences with animals. (Odd because they come out as behavioural issues, since they can't tell us how they feel physically...)

Btw, just back from reading almost the whole of that transgender thread. Dear god. I thought I was inured to the exclusionary behaviour of so many feminists, but it's really galling to see people making womenhood into the No Homers Club. :( I don't see how Juliet Jacques being a woman diminishes my or anyone else's womanhood....