If both your snakes are feeding on rat pups - you should remember that rat pups only stay rat pup size for about a week to ten days and your breeder will drop about between 8-14 rats, which means you get one or two fresh meals and you'll most likely need to kill and freeze most of your litter before they get to big for you snakes.
With mice you don't really have the problem of them out growing your snake before you feed off the litter. But mice stink are harder to breed and if I didn't have "live mouse eaters" I wouldn't be raising them.
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Tosha 
"One of these days i am going to wake up..look around...and realize my place looks more like "Ace Venturas"s than my own." Coldthumb
7.33.0 Ball Python (Harry and Fluffy and gang)
1.0.0 Angolan Python (Skywalker)
0.0.1 Green Tree Python
0.2.0 Feline (Pippen and Pandora)
0.0.1 Dessert Tortoise (Pope John Paul)
2.2.1 Fish (1,2,3,4)
0.0.0 Pool skimmer rescues for this season