The rabbit was only able to see the huge anthromorphic Ice Weasel charging at it at the very last second. Yifa was easily able to kill it and rip its heart out with one fell swoop.  Drinking the rabbit's heart-blood was an equally easy task.  Now all she had to do was get back to Mera and make sure she hadn't been ambushed by any unsavory types in the couple of hours that she had been absent from her.  Of course, Mera could look after herself against human opponents.