So I know this has been discussed in detail here, but I haven't seen anything conclusive on whether Purina Flockraiser has enough niacin for ducklings. I have three five day old ducklings on Flockraiser, and one of them just started having problems with one of her legs. It's like she's just not really using it. She can walk around but she limps and seems less active than the others. I have them on towels in the brooder (so it shouldn't be hard to walk on), and I'm going to the store to get some poultry vitamins for their water. Any other suggestions? Do you normally have to supplement with Flockraiser?