I put a few duck eggs under a roosty hen just to see what would happen. About 2 weeks after the two chicks hatched I found a duck out there. My hens tried to kill it and almost did. I brought the baby ( now named chomp) in to the house and began nursing her back to health. Chomp is still yellow but full of feathers and it is very cold outside, -2 to -10 F at night. My other ducks are not very happy with the temps. It is not getting above 10 F during the day. Our geese seem to be picking on the ducks and hogging the water. How cold is too cold for ducks. This is their first winter. They are pekins. My female also developed green spots on her beak yesterday. Is she ok? How old does chomp need to be to go outside. I think she is great but would like her to go outside, but I dont want to loose her to freezing temps. I have heaters in their water but I am having a hard time keeping them thawed. I dont want to move the ducks inside but I will if they need it. I have had ducks befor but never in weather this cold. Any help would be welcome.