All BPs should be fed every 5-10 days, depending on size of prey you're offering and number of prey if offering much smaller prey. As nutritional value goes, to my knowledge, there isn't a huge difference between mice, African Soft Fur rats, and other rats. It's usually up to the individual snake's preference. It is believed that most BPs accept ASFs more willingly because that is the prey item most readily available in their natural habitat.