My BP has recently decided the eat only mice. For a while I could get her to take a rat but I had to offer a mouse first and prime her. She soon figured that trick out.
She eats f/t and I don't want to try live b/c I'm afraid she might grow fond of those.

So other than the cost, why should I care? Is there any serious harm in feeding 10% body weight in mice instead of in rat? Put another way, what is the difference between three or four 30g or 40g mice and two 60g rats?

Other notes:
She's a 1200g female, a 2011 hatchling, and I currently have no intentions to breed her.