The droppings look abnormal to me as well - I suggest you contact a veterinarian in your area and ask if they will perform a gram stain and a fecal floatation. Both tests are fairly cheap, and will give information pertaining to the bacterial load in the feces, and whether there are parasites such as worms.
If a vet is not an option, there are places online you can send the droppings to for test:
https://www.amazon.com/Reptiles-Rab...=1612875157&sprefix=fecal+flo,aps,238&sr=8-14
If a vet is not an option, there are places online you can send the droppings to for test:
https://www.amazon.com/Reptiles-Rab...=1612875157&sprefix=fecal+flo,aps,238&sr=8-14
My duck's been recovering for the past two weeks. She's notoriously improved. Here are my duckies chilling out:
