I also have a cat that gets constipated in winter, every year he is at the Vet's regarding his constipation sometimes spending 2 or 3 days there. He has already been this winter for two nights. When I give him his canned food I mix quite a bit of water and make it souplike, it's a good way for him to have water intake. He is also managing on Lactulose daily, 1 or 2 times and 1 pill of cisipride. Also to his wet food I add 1/4 tspn of Physillium Husk, like I said so far so good, even if it is in the middle of the kitchen floor