picky snakes

[TheZoo]

so both of my ball's are picky little monsters where as my other snakes are garbage desposals but my little one scars me Ive tried senting, braining, hot, room tem, in tank in feed box ect I even tried starving her out (well she wasnt eating anyways I just stoped trying for like 3 weeks) but so I think I founf her prefrence. Its white adult mice f/t Ive tried using fuzzy/hopper rats that are white but she wont budge and Im not sure what to do! then the adult will only eat weaned/small rats color dosnt matter hes also a on agian off agian feeder but its like really both of you wont eat the size I need or want you to and on top of it they only eat one at a time so i cant just fill them up. so what should I do?