I am so sorry for your lose of the one gander. As the rest have said you did nothing wrong and did give it a try he was just too far gone for you to help him. With geese you have to hope on it right away because they go fast when something is wrong.
Now get on the other gander on the sores. I would hate to see you lose him as well from them sores...
Now get on the other gander on the sores. I would hate to see you lose him as well from them sores...