Our 3 yr old rescue moggy who we have had for 18 months has suddenly become very restless. She’s not keen on DS aged 7 but would sit next to him on the sofa on an adults lap when he’s gone to bed. She loves it outside in summer so it was no surprise she spent most of her time in the garden and came in for a lap sit in the eves. Last year when it got darker and cooler she was in, plonked on a lap at the earliest opportunity. This year she’s up and down, on lap, off lap, outside, inside, she just can’t seem to sit still. She’s eating ok & is zonked out all night just fine. She’s always over groomed her tummy since before we got her. I’ve got a feliway but no effect. She seems so lost 
Can anyone interpret what’s going on and what I can do to help her relax a bit?