I had 2 ducklings hatch yesterday, and one this morning. I have them in a brooder with access to chick starter and water. One has begun eating, and I gave each duckling a piece of earthworm for protein and niacin. I plan on getting brewer's yeast today, but is it possible for them to develop issues in under 24 hours? They all seem fine, but I just want to be cautious, these are my first duckies after all.