We've had a rescue cat since February and she's settled in great. The last couple of days she's been not herself though; hiding loads, low to the ground, seems very subdued, not eating as much...other than the smaller appetite she looks healthy but seems nervous. There is a new cat in the neighbourhood and I did see him chase her so I'm wondering if this is what has upset her. Also it's been very windy/rainy which she doesn't like. Anyone else's cat ever behave like this? Should I be worried?