Hello

Yesterday afternnon, I bought to baby geese and two baby ducks as companions for an adult female goose. She took to them all at first (she never had babies of her own, though she tried three years now) Anyhow, I went out to fed them this mornig and discovered while she has the goslings with her and is very protective of them, she despises the ducklings and even broke a leg on one of them. What can I do to help it (if I can catch it that it) I dont want to chase it and have it hurt itself more, but I dont want to just leave it like that either if I can help it. I have googled and other searches as well, and cannot find an answer. Plus, can the duckling survive and manage as an adult duck with a gimp leg? Will it be able to fly and such?

Thank you in advance for any help.