You did your very best and that's what counts. :thumbsup
I'd give the one that made it some electrolytes or sugar water to give it a little boost and some niacin as well.
X2 Though when you put him in the brooder if he's all alone he's going to peep his little head off :lau Once we had a duckling, chick and gosling (all roughly the same age) In the same brooder, they were best buds.