His laughter echoed with that of Ripper's. The shadowy creature lumbered away from the herd they had harassed into fleeing, making his way toward the bison. Hot on Ripper's heals, he matched his brothers speed as they crossed over each other, both going for some part of the Bison as did the others. It was weakening, slowing down. And even as Ripper threw himself at the bison's hindquarters and was getting his shit rocked, Grim rushed in, teeth snapping to catch a hind leg to at least try and keep one of the limbs from continuously striking his brother. Snarling a feral sound, Grim grabbed onto the left hind leg, viciously shaking his head until he heard the crack of bone within his teeth. Slowly but surely, they were wearing the beast down. Bleeding it out. Mother would be proud!