We have a mix of duck breeds. 2 jumbo pekin, 3 black runner, 3 fawn and white runner, 2 cayuga, We also just picked up 3 buff ducklings from Metzer that are 2 days old (metzer sent us the wrong breed, so they sent us 3 ducks in replacement, awesome customer service by the way!). So, I have a couple of additional questions. Can I put the 2 day olds with the 1 week olds? They're so much bigger than the little ones! I have them in their own cardboard box next to the bigger brooder and they're sharing the heat lamp right now. The week-olds go back and forth in the light. Sometimes they sleep under it, and other times they huddle together in another part of the brooder. I suppose if the 2-day-olds can go in with them then I'll just have the lamp available to them 24/7. The air temp during the day in our laundry room where we're keeping them is about 75-80 during the day, and 50ish at night. Thanks a ton for any tips! This whole duck thing is new to me!