No reason , one I think had a nician issue awhile back so I literally bought everything in the health isle to help him , and he got better. they free range and I feed all the time whenever food is empty so usually 2 or 3 times a day depending.
I haven't even had him a year , duck is probably 4 -5 months old.
I have 2 more ( which I got in Aug. ) and they seem fine. I feed them all Purina dumor , and also just started mixing in poultry pellets , poultry booster , and brewers yeast , poop is hard to tell whose is whose , but they are...
my duck randomly started losing weight , he or she I don't even know ( I'm new to this duck mom thing ) still eats , plays , swims ect. and acts normal , just got way lighter. I'm not sure how to figure out what's wrong or what to do