HELP! BUMBLEFOOT?

[MallardMomx2]

How old are your ducks?

I have two 10 month olds mallards and four 3 week old mallard ducklings. The ducklings, one in particular (OP picture) has it much worse than the parents do.

 

[MallardMomx2]

Here’s how it’s looking today. Any other ideas of what it is or how to treat it??

 

[MallardMomx2]

Getting worse, any other ideas?