What situation would most likely cause ecologists to change the roe deer's classification?

Answer

If meat composed a significant portion of their diet, even seasonally

The current classification as a herbivore is supported by the overwhelming preference for plants; a significant and sustained intake of meat would necessitate a shift in classification.

What situation would most likely cause ecologists to change the roe deer's classification?
dietmammalherbivoreCarnivoreRoe deer