That sucks bro. I'm sure it should be ok to starve it for 3 days but at such a young age it should eat anything after being starved for that long. I've starved my 5" Datnoids for 3 weeks before to get them off of live and finally they accept most types of food now. For my RTG now I feed different foods everyday instead of stuffing it with superworms daily. Superworms 1 day, then market shrimp the next, and then pellets/krill third. I'll probabely take the advice of skipping 1 day of feeding then repeat. I also do alternating foods for my stock in my 450 but I don't feed daily. I only feed 3 times a week with foods of full raw market shrimp, full frozen Lake smelts, and hikari pellets. Also once in a while I'll throw in some anchovies just to clean up their digestive systems.