Hello, I’ve just received 3 ducklings this morning. I noticed my welsh harlequin duckling, Penny, is keeping her head close to her body, more so than the others. And is not very active. She also doesn’t walk or run around as much as the other two. She just seems kind of lethargic and her eyes are small like she’s squinting. She’s also shaking a little bit like she’s cold. I have put brewers yeast in their food and she ate some along with the others, and also drank a little water. I want to give her some sav-a-chick but I can’t find the correct dosage. I only want to give them about a cup of water not a gallon. I’m just wondering if anyone has any suggestions as to what I could to help perk her up a bit? Thanks.