I noticed today one of my male call ducks shivering and limping a little. I caught him and felt him over. Both legs and feet felt normal, no heat/swelling, no cuts/abrasions. It was pretty cold today (20s and windy). So I got him inside and into a warm bath. I checked the other 3 calls, and the two girls seemed ok. The other male wasn't shivering but looks to have a little frostbite on his bill. So they all join the first male call in a warm bath. Now I have 4 warm but wet call ducks. All 4 are very high strung and being held stresses them out, otherwise I would cuddle them in a towel. Right now, they're all in my brooder, a 42"x21"x18" storage container with a wire floor insert, and a cover with air holes so they can't escape. They have food and water. Can they be ok overnight in this? Its supposed to get down to 7F tonight. They should be dry by morning, but things aren't going to be warming up. We're in the 20s during the day and single digits at night for a while. I have pine pellets and hay for them in their house, but I'm worried that they still aren't warm enough. My big ducks and African geese are doing fine. No issues there. Just the calls seem to be having trouble.