My Welsh Harlequin (6 month old) is quacking its head off and acting scared all of a sudden. It opens its beak, almost like a silent hissing and is just being skitty/scared. This is at night when I put them away. I have just noticed this the other day when putting them away. It was dark out....no moon light...so I thought maybe they were just scared of the dark. Other than that, she's known to be the sweetest one as that breed is known to be the calmest. Hmmm.... I've recently switched their feed from regular organic crumble feed to organic pellets Only one of the three ducks seem to be laying right now and I know which one that is...the black swede.... Hmmm.... could metal poisoning or something along those lines cause weird behavior? Lice problem? All three ducks seem to be more scared than usual, but the Welsh is really bad.... I can still hold them, pick them up to put them in their house, but they are more skitty than usual. Once they are in the cage, they are fine....clean themselves...all the normal.... My poor Welsh...what could be causing this? She was never like this...like I've said she was the sweetest of them, although they are all sweet. I've raised them from a day old...lot of human contact....fed nothing but organic food...everything the best.... To summarize: It's been really dark... They have a red heat lamp.... Switched from organic crumbles to organic pellets... Oh wait...I did wear my glasses that night...but really? Could that be it? Don't they know me by now to recognize my voice at the least? Possibly: Just scared of the dark? Don't recognize me because I wore my glasses? Could it be the new feed? Metal poisoning? Lice problem? Eating paint chips off of the shed etc...? Parasites? Solutions: I'm going to start putting Organic Apple Cider Vinegar in their water feeder again. Diatomaceous Earth in there feed... Anyone experience this "all of a sudden," behavior?