OMG YES. 100% SUPPORT THIS IDEA. I would absolutely LOVE to walk around with a pet Blood Nihil, instead of having to repeatedly buy pouches and extend them constantly when I get 87 summoning.
"Do not confuse darkness and light with evil and good. Real life does not deal in absolutes, not extremes. All life falls on a spectrum, and all life has capacity for both good and evil."
-Zaros, Fate of the Gods, 2014