Suggestion

Expanded Grade Bonus

Improvement

Modifiers for breeding based on grades. Something along the lines of a +10% breeding bonus for an S grade bull or cow, A no modifier, B -5%, C -10%, and D -20% to show how virile a bull is or how fertile a cow is. Stackable so an S grade cow bred by an S grade bull would get a +20% breeding bonus. Should apply after Mooagra so that a B, C, and D grades bull would not have 100% breed chance so that there is another incentive to get their grade up and keep it. S grade Bulls could possibly give a better bonus to the cow's milking rate too.