I bought two ducking the week of Easter. The one wasn’t doing well at first (had leg problems) I gave them peas and medicine to get the vitamins needed. Fast forward to now the other duckling just randomly stopped eating I noticed yesterday she didn’t eat at all and today I found her dead. She has dots on her beck that I’ve noticed now. I’m worried she might of been sick and it will pass to my other ducks and get everyone sick and cause death. Any ideas on what could of caused her die or what the spots on her beck could be?