What is the best way to introduce vitamin A into your gutload? I currently use mixed grain (rice, oat and barley) baby cereal, collard greens, mustard greens, and alfalfa. When they are growing around here I also use dandelions. I know that mustard greens contain some vitamin A but is it a sufficient amount? Is this enough to gut load with or are there things that I should add or remove? Thanks in advance for any responses.