I purchased some ALL Stock feed from Tractor Supply and on the tag it says that it can be fed to "Mature" Cattle, Horses, Sheep and Goats. What does "mature" mean? What's the age for mature? Can a lamb younger than 1 year old be fed All Stock Feed? The worker at Tractor Supply said yes they can but all of the workers seem to be 18 - 21 yrs of age and I don't trust what they tell me.