I just got my first ducklings four weeks ago. I got an Indian runner, a white crested, and a black Swedish. I don't plan on eating any of them, they are just my little buddies, but my black Swedish is significantly smaller than the other two. She gets cold very easily, she gets pushed around, and she doesn't eat as well. She does eat though. She does poop, and it looks normal, nothing odd about it, just like the other two, but I was reading about parasites and intestinal problems, and now I'm worried about her. I let them run in our back yard on a regular basis, along with the chicks, but our yard stays pretty bird free, especially this time of year, and I'm always out with them. Because I don't plan on eating her, I haven't fed her any special meat duck food, and I was thinking that might have something to do with it, but I'm not sure, and I already had one chicken die of sudden death, I don't want to lose my little baby. I'll try to include some pictures of her and the other two, for reference.