This will be my first year overwintering ducks. I was hoping to find out how cold is too cold for me to let them outside or to play in water. The wild ducks around here play in the water all year round in an area that has run off keeping it thawed out. However, this seems too cold. Also, If they lay eggs in all that layered composting poo it seems that those eggs should be thrown away or only used for hatching, what are your thoughts on this?