The cold makes a big difference to Maggie as well Maria. As soon as it starts going towards freezing overnight she really struggles in the mornings with stiffness, and the same in the evening when we go out if its too cold. I've got a heat pad that was supposed to be for hands that I heat up and just run over her back and leg muscles. Or if we've been out and she's a donut and goes in the river when its too cold I'll bring her back and pop her in a slightly warm bath just to help her relax again.