What about other treats does she eat them? It could be many things as Amiga said but if they aren't acting sick that would be hard to diagnose other than blood work.If you haven't seen mating then I don't know if she is getting ready to lay but maybe, I don't have Mallard derived ducks and with my Scovy's mating comes before egg laying. Keep an eye on them today and let us know what you observe. They go through so many changes when maturing this maybe just one of them or there is really something going on. You checked feed for spoilage right and no mold anywhere to be found? What about outside plants?OK so JoJo officially has his first drake curl, but I seriously think something is wrong with my ducks. They've been action g weird the last few days. Jojo is letting me just pick him up which usually its a chase, even when he goes inside, he does a few laps before stopping at the basement door. It charlie is my main concern, she hasn't been eating from what I see, or pooping, I've been working a lot but the basement isn't as messy in the morning so something's different. She doesn't quack as much. I watch her drink but she just passes over the food. She still runs around and acts normal. I dunno how to explain, I don't think either one of them is sick but something's not rignt. I haven't seen them mating, they aren't fighting, but could she be ready to lay eggs? They are about 4 months old or so. I am so worried!!!!!.
