Hi everyone! I have some problem with my duck poop
So my ducks are almost 4 weeks. I know that their poop smell bad but today, while cleaning the run, I see abnormal poop of my duck. Outside of it is black and like a thin shell you can find in an egg and hard to take off. Inside of it is a brown watery poop (Like in the picture). It smells so so bad and it is like elephant poop smell in the zoo. I don't know what happen but that scares me if they aren't normal. Someone please help and I am very appreciated
P/s: I just move to US so sorry if my english is not good ^^
So my ducks are almost 4 weeks. I know that their poop smell bad but today, while cleaning the run, I see abnormal poop of my duck. Outside of it is black and like a thin shell you can find in an egg and hard to take off. Inside of it is a brown watery poop (Like in the picture). It smells so so bad and it is like elephant poop smell in the zoo. I don't know what happen but that scares me if they aren't normal. Someone please help and I am very appreciated

P/s: I just move to US so sorry if my english is not good ^^