High concentrations of dietary vitamin D - Mike Persia

Thank you Mike for a good presentation, I would like to ask what ingredient do you use from day-old chick to make sure at the point of lay the dietary vitamin D is available?

great presentation, Mike

you mentioned that too high a vit d level also created issues in young pullets,
Can you further discuss what level did you see problems, and what form of vit d?

also in layers what did you see when too high or low, and what would you recommend in layers?

thanks, Mike