You cannot feed the ducks in the quest. They are uninteractable, leaving you with no way to complete the quest.
Having the same issue, found another thread where interacting with the duck “Pilot” jumping off the rock first solved this but it’s not working for me.
Same issue. Abandoning quest and all recommended other tricks have not worked.
Same issue, I can’t interact with any of the ducks currently.
Same issue. No interaction, no way to feed them.
I can interact with 3 of the ducks initially, but Pilot bugs out. After dropping the quest & picking it back up again, Pilot & another duck bug out.