I just received an order of 25 ducklings from Metzer. 3 were doa and 1 just died and is bleeding from the mouth and vent--I went back and checked the doa ducklings and they all have dried blood around their mouths. I called Metzer and they said they have never had this problem and believe it to be caused by the ducklings picking on each other. I am VERY concerned this is duck plague or something equally concerning. Has anyone seen this before?? Thank you!