I'm in San Antonio & I too cannot stand this cold! I felt so sorry for my 4 month old hens that I put a heating pad & a flood light in their coop to keep them warm. I was so relieved to see 1 hen on the roost under the light & the other 2 snuggled together on the heating pad! The 4th chicken got sick
, she was wheezing & sneezing so bad I was afraid I was going to lose her. I brought her inside & for 2 days she wasn't getting any better. I did a search of the forums and discovered the miracle drug Tylan 50. I ran out and bought some, gave her an injection and the next day she was so much better.
She got her second injection this evening and is well on the road to recovery. So, if any of yours should get sick from the cold, just start them on Tylan 50, you & the chickens will feel so much better! Good Luck