Alright i managed to heal myself to full! Took the bicycle and made loops in a clearing. One pig spawned, cook and ate the entire pig. Another two pigs spawned together much later, cooked and ate them both. Went from less than 4k blood to almost 12k. I didn't know my bicycle was green! Thought it was grey! Protip: To hide bicycles eject from them at low speed when inside a large pine tree near the ground. You end up with the bicycle toppled flat inside the leafy area, much better concealment.