First and foremost.....Welcome to the family. The girl told you wrong. You definitively need to feed him bigger prey. You said so yourself.....feed him the same as his girth. Pinky will not do that. I am a numbers guy so 10 to 15 percent his weight. I weigh my BP and also his food. Others just go by size (girth) of their noodle. Either way pinkies are to small. Out of the egg they are at least eating hoppers.