I just joined the Catsite and am hoping for any and all advice you can give. Over the past six years, my husband and I have been taking in feral cats. We usually work for MONTHS to gain their trust by feeding them before we can get close, and then we've taken them in to be spayed/neutered and shots and they've become part of the family. They have been indoors with us until it's (a) gotten to be too many and (b) we'd wanted to get rid of cats on the counter, etc. (husband is a chef). We have now become an unofficial sanctuary with 18 cats (a few were pregnant and had kittens when we took them in). We have a nearly 400-square foot deck that we recently had screened in and a roof put on - they now have a beautiful home; however we are unsure how to keep them warm in winter since it's screened. We live in northeast Arkansas where temps can drop to the 20s at night / 40s during the day. Will we be able to keep them outside and if so, what is the best way to go about keeping them warm? I've looked into heaters, the individual shelters you can DIY with crates and straw, etc.
Thanks in advance! (Attaching a picture of these spoiled cats home)