I would get a fecal sample done ASAP. When ever my Black Throat or Water refuse to eat they have a problem. most of the time it has been do to parasites and if they have a big load they will not eat. My black thraot stopped eating two monts ago ran a fecal test and he had a intestinal worm and after his second treatment he started to eat again.
On tamming leave him alone for a while an allow him to adjust. My black throat took over three months befre he stopped running everytime I came into the room. Work at his pace and try not to push things. He will come arround in time. Tame is a realvent term with Monitors. Good luck.