I would like to start feeding my ball python rats because from what I have read they seem more nutritious and have less fat than mice. I am currently feeding my ball python 2 hopper mice and I was told i should be feeding him rat pups. The problem is both reptile pet shops near me only carry small rats and up, which are too large for him. Should I just keep feeding him mice till he is large enough or should I try to order rat pups online? How much of a difference does it make feeding mice vs rats?

Thanks for the advice in advance!