Is he a baby, or adult? My adult male Goblin has not eaten since Valentine's day, but he is still fat as ever.
My little female BP Octavia was another story. Like your BP, she would go off feed for weeks; her record was two months. Finally she actually took the mouse (it was a fuzzy, live.) I think that the bigger mice were just too scary for her, and she had completely ignored the f/ts of all sizes that I tried. I kept trying, but I limited my tries to once a week. I left her completely alone between-time, since handling seemed to frighten the hell out of her. Oddly, one day out of the blue, she began eating when I fed the live fuzzy. Now, she eats everytime I try feeding her, even eating f/t rats headfirst without even constricting them.
During the time she wasnt eating, she seemed to not grow much. Now she is growing like a weed.