When Kenny and Ellis bring back the new people to the colony house. As everyone rushes get into the colony house. One of the monster gets close to Julie, Kenny shoots it and the monster bleeds.
Later in season 2 when Boyd kills a monster and he does an autopsy. He finds that there's no blood in the monsters, just bile. So the monsters should not bleed when shot.
Later in season 2 when Boyd kills a monster and he does an autopsy. He finds that there's no blood in the monsters, just bile. So the monsters should not bleed when shot.