It's called chick grit because it is crushed small for young poultry.
As for the niacin it can work pretty fast we have seen where a member started their duckling and in a few days they are walking better by a week completely over it. This is a niacin def. If it's an injury then the niacin can still help but rest and water therapy will help the injury heal.
I had 2 adults limping a few weeks ago no visible sign of injury so I started putting Nutritional yeast back onto their feed and both girls aren't limping any more. It took almost 2 weeks to see it help them.
As for the niacin it can work pretty fast we have seen where a member started their duckling and in a few days they are walking better by a week completely over it. This is a niacin def. If it's an injury then the niacin can still help but rest and water therapy will help the injury heal.
I had 2 adults limping a few weeks ago no visible sign of injury so I started putting Nutritional yeast back onto their feed and both girls aren't limping any more. It took almost 2 weeks to see it help them.