I built my duck house this weekend. My 3 ducklings are only 2 weeks old but one of them is a few days older. He/She is a black runner/Rouen cross and is just too big to be in the house already. Here is the setup. Tell me if I should go and bring them in. I have a wooden dog house that is about 3.5 ft x 3.5 ft. It has a wall inside next to the door so that when they walk in they have to walk around the wall to the inside room so they are protected from drafts. It's about 2.5 x 3.5 in there. I put down 2-3 inches of pine shavings. There is a 250w red lamp in the little room. Directly under the lamp it's 88 degrees right now. Outside the door there is a ramp going into a 3x6 foot enclosed pen built out of 2x4's and 1/2 inch hardware cloth. It's got hardware cloth on the top and bottom too. They have a refilling water bowl hooked up to the hose with rocks around it and in it, so the little one can get out. Their food is out there too. I also put a waterer in the hallway of the doghouse so they can drink at night without having to go outside. Ok, will they be ok or should I bring them in? I should also mention that one of the ducklings is a possible failure to thrive. She is 1/3 the size of her hatchmate. She is progressing, but not really thriving. She is happiest with her 2 buddies though, and they snuggle her to keep her warm.