We're dealing with a creature from the canidae family that's over two hundred years old.

 (Excerpt Alma Introduction) “Look at the results and atwhat happened to the blood samples that were added to the OO Negative.  The samples were drained of all theirnutrients and healthy cellular functions before it too turned OO Negative.  However, with the blood samples added to theOO Positive, they weren't drained.  Theywere immediately converted to OO Positive and instead of being