A young Sacrificial Blood Rabbit, before its innate powers awoke, was almost no different as a big eared rabbit, except that it possessed a stronger life force. In terms of power in battle, they were basically the same, and that was why it had been so badly ravaged by even a low grade Spirit Beast, and was reduced to that sorry a state.
After Jun Wu Xie saved it, the blood it bled had awoken its innate abilities which caused it to reveal the look that a Sacrificial Blood Rabbit was supposed to possess.