Hoping to get some advice for this baby. Not thriving like the other two, bare spots with no feathers, a lot smaller. Seems to be eating/drinking fine and keeps up with the other two. They are all around the same age (approx 6 weeks) and purchased at the same time. I have been supplementing with powdered niacin in their water and nutritional yeast in their food since the beginning. Any ideas?? 1st time having ducks and love them already! 
Pics: #1 is the baby in question. #2 - all 3 ducks for reference. The other 2 are doing great!

Pics: #1 is the baby in question. #2 - all 3 ducks for reference. The other 2 are doing great!


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