I've never had a young snake hatchling up to a yr refuse a meal unless they were stressed out. I've had yearlings more around yr and a half stop feeding and fast. This is more likely with females as I've noticed they start practicing they're "schedules" for reproduction. I have had a younger snake my female cinny that did this type of behavior when I moved her into an adult tub from a yearling tub. For 3 months in a row she'd snatch up the prey but not eat it. She was also very defensive of me when I'd clean change water etc. Shed strike whenever anything would come near. I chalked this up to the tub change as she had more room and possibly felt more exposed. Even though there was two good hides in the adult tub. I moved her back into the yearling tub and she went right back to normal. Less stressed behavior no striking and eating after constricting. Maybe this little girl is a bit stressed out. Sometimes it's a defense mechanism if they feel backed into a corner. Hope this helps. Good luck
Morgan