True Grape still a foal I think just putting him with an adult fluffy is a small mistake by Hank, it needs its mother for such problem. And Midas isnt a father material too.
Maybe some fluff shaving for Midas as punishment. Until if he really turns problematic, would have turned him into a seed collector only no enfin mare and anything deprived of his entitlement.
Even maybe show him how good and well behave the new stallions.