Bleeding
Bleeding is an ability that Acrocanthosaurus will have.
Rather than do health damage over time, bleed will stop healing of injury damage, health, and comfort. This way, an Acrocanthosaurus can pursue its prey over time rather than go for a quick kill. It also deters larger predators like Tyrannosaurus rex from attacking an Acrocanthosaurus.
While bleeding, you cannot heal injury, health, venom, or increase comfort. It's meant to be a debuff that disables a foe from recovering during a fight. Since the apatosaurus is such a long hunt, it could be particularly effective in disallowing it to continue healing so a pack of carnivores may have a better time wearing it out.
Bleeding will get worse while you move, and it disappears somewhat rapidly when you rest, staying stagnant while you're standing still.