My 4 girls are 1 today! I have them on organic purina layer crumble. I occasionally give them dried meal worms as a treat and of course greens, oats, ,berries, and crushed egg shells for extra calcium amongst other appropriate foods. I do not have them on any supplements. The owner of our local feed store told me "if it ain't broke, don't fix it!" In other words if they are healthy, no need to supplement! They grew up on chick boost and I just saw yesterday they have an adult version. I don't use anything in their water either. I feel like I should be doing more! thanks in advance!!