Hey everyone, I've raised laying hens before, but this is my first try with ducks and I have eleven Pekins from Murray McMurray that are a few days away from three weeks old. They're very cute, but they're already enormous! This morning, when I went to let them into their run, one of them wasn't able to stand up. I took her (I'm guessing a her because her squeaker is starting to "break" ) out separately and tested her in the kiddie pool to see if she could swim - she was able to swim, but seemed to experience discomfort when using one of her legs (I also may have had my overprotective Mama-vision on). I tried putting her on the ground and she was able to run back to the rest of the ducklings, but she had a horrible, lopsided run and sat down immediately after joining them. All the other ducklings were running around with ease and hopping in and out of the water, but she just sat where she was. I separated her from the group and put her in a box in the shade with food and water, which she consumed eagerly (though she'd ignored both when they were out of her immediate reach). I kept an eye on her throughout the day and she's maintained a healthy appetite, and has even scooted around a bit in her box, but seems to have low energy level both in the box and when I hold her. My ducklings are usually very active, but she only moves occasionally to adjust her position. Her other symptoms were odd defecation - her stool seems to be foul-smelling water with a few grains of feed in it, and possibly wheezing (I can hear her breathe if I listen for it, which I've read is the poultry version of wheezing?). I've checked her over and there is no swelling or obvious signs of trauma. I've been thinking over how she could have injured herself (because I'm hoping this is injury, not illness), and a few things come to mind. The one that makes the most sense, is that she climbed up on the nest box I have in the duck coop and jumped off of it. It's about a foot tall? Maybe a little taller? If it's this, then it would make sense that she's the only duckling injured, as the ramp to the top of the nest box is fairly steep (purposefully, to discourage the squeakers from getting up there before they're old enough to use it) and the food and water incentive is to stay below. Another possibility is rapid weight gain, which I'm skeptical of, mainly because she's about the same size as the other ducklings, all the ducklings have had some milk and a good amount of veggies in their diet to promote strong legs and slower growth, and none of the others have had this problem. I'm fairly limited in my duck knowledge, so I'll keep researching, and hopefully someone's got some ideas on here! I'd be much obliged to anyone who tosses a few my way. Oh! And for anyone who's worried about her stuck in a box, she's now in my bedroom in the brooder with a heat lamp, water and a dish of pureed spinach mixed with nonmedicated chick starter. She sounds contented and will mutter to herself when I move my foot (which is the only part of me currently visible to her) and was snuffling around in her water dish before she scooted away from it to get some (drier) rest. So, any ideas? Is this an injury? An illness? Is she spraddle-legged?