that first picture is the same thing my duck has but his is scabbed over which is why it's black. when he kicked off his shell he was bleeding in that area so i put a warm wet towel over the spot for a bit. it is certainly not his vent since i can see/find his vent separately.
that doesnt come out when he poops it is just always there.
he poops but it is few and far between. poop is more solid than the other babies.
if the duck starter is medicated, is it possible to give them too much?
also, do clogged crops cause constipation?? in other words, if their crops are swollen but theyre pooping a lot, are they fine?
i have to take him out to separate him sometimes to watch to see if he pooped since he is with three others. whats a crumble slurry lol, feed soaked in water?