"Naval Rat" ? :S

[whoaxmary]

So, today was supposed to be feeding day for my snakes. . . But when I went to get my bag of rats, ratpups, and hoppers outta the freezer I couldn't find the bag anywhere.... It's a big deep freeze that we keep pretty stocked (my parents would snap if I kept them in the fridge freezer) so I figured they must of just gotten shoved down near the bottom... While looking my foot hit something soft... I looked down and saw a bag of fries, something else, and my bag of rats! Some one went into the freezer pulled a bunch of stuff out and forgot to put it back! D: So, there goes a months worth of food for three snakes. x.x
I phoned my boyfriend and asked if he could grab me some before coming home from visiting his parents, and he ended up picking rats up from his sister for me... They're called "naval rats" I think, and I can't seem to find anything online about them. Just curious if anyone else uses these as feeders? I'm not planning on keeping the snakes on them, just 'till I have time to go get their normal meals.
In all honestly, I guess I'm mostly worried my ball python will get used to the different food and not want to go back onto her rat pups.
Opinions?