Hello, my name is Amber and we just added 3 ducklings and 6 chicks to our family. I'm looking for a little advice for one of the ducklings. It seems smaller than the other 2 and it will not walk a whole lot. However it is eating and drinking fine. We have added the vitamin enriched food and mixer to their water and the little one still doesn't seem to walk as much as the other 2. Any advice? Thanks!!