Hi I have a female Rouen duck, Aphrodite (Afro), but I'm pretty sure she's a male. She has constant diarrhea Her eyes are watery and bubbling, so we tried putting a saline solution on her eyes. She didn't like it, but it made her feel better for the next few hours. There's no part of her eyes that are foamy, at all. Just bubbling. One of her eyes stay completely shut for long periods of time, so we warmed up some soothing chamomile tea, took a cotton ball and gently washed her eyes with the chamomile tea. The other day we went to a store called the Mill near Pennsylvania, and we got Afro some antibiotic medication for diseases, colds, and parasites, and we put it in her water. Yesterday, my mother and I discovered that Afro stopped with the diarrhea. All she was doing was just trying to push something out of her vent. So I picked her up, and we saw a HUGE vent blockage, about 2" long and about 1" in diameter. So we worked with her for a little bit last night, and finally, we pulled out the blockage, and diarrhea came pouring out. She had a PRETTY BIG accident on our garage floor! After that she started running around like crazy, and then we put her back in with my other duck, Heracles (Herc). She felt better after sure and then she actually sat down comfortably! We hadn't seen her sit down for days! She finally slept last night. So today I saw poor little Afro pushing and pushing again. So my mother and I looked again on her vent, and, sure enough, there was a whole nuther piece of blockage in her vent! Like the one before, it was as hard as a rock, and it hurt her so bad when we tried pulling it out that when I let go of her and set her down, the poor thing was shaking in pain (and fear). We didn't manage to pull it out, but we will tonight. Her eye is still half-closed and crusty.