Waiting out or treating an injury before entering a new fight isn't mandatory; but it's not a bad idea either!
Upon completion of the injury system there will be disadvantages and handicaps for dogs that re-enter fights with unhealed injuries from prior ones, 'unhealed' meaning they haven't been addressed by a Yard vet, or auto-healed with a shop item beforehand. The odds of a chronically battered dog winning will shrink with each passing fight-- but will never be completely zero!
May the dice roll in your favor,
- The B.O.T.B Team