I doubt any stores have ducklings around four weeks old. Most for sale are just a couple days old. I would be hesitant to put the older duckling with the "newborns".
@Miss Lydia
I will give it a thought. Do you think there's any chance my duckling will bond to herself? :P
I have a peculiar dilemma:
My duck laid an egg in the turkey nest, and mother turkey hatched out a duckling at the same time as her turkey poults. She adopted, and they are doing impressively well together. It has been four weeks now, with almost no problems. They are free range during the day...
