I'm new to poultry pets. I have five runners in a 7x15 run with a coop consisting of a 6x3 wood "box" with removable lid, wood shavings, and vent holes cut in the back. I live in southern California at a higher elevation so we have generally mild winters but can get to freezing at night and sometimes snow. It sounds like ducks are pretty hardy and I'm hoping the set-up is sufficient. I was wondering if i should take away the kiddy swimming pool in the winter, or leave it for them to play in despite freezing weather. Any advice or input? Thanks!