3 years ago we got a days old wood duckling our enighbor found in her yard. She would eat much at all, just kind of stood in the corner of a box with a heat lamp over it. Then we put her in with 6 days old buff orphington chickens and she perked right up and joined up with them (we gave them non-mediated starter). When they got older she would perch next to the chickens at night. The chickens got much bigger than her but they'd still follow her around the yard.