It should be on PN...regardless...I don't know if it will cure
anything, but it will provide the nutrition needed.
PN isn't a hot feed. It is a diet balancer.
How old is this colt?
I recommend everything to be on it, for safety's sake
and for proper nutrition.
Have her go to www.prognutrition.com website where
she can ask questions or call them and ask for Kelly Graber.
Pretty fantastic folks there...