Like someone else has mentioned, I do recommend getting them started on rats while they are young and hungry. Once they start to get some age they will in print in the mice you are feeding it, it will be a nightmare to get them to eat rats then. Trust me!
Not to say mice are bad, but as the BP gets older you are gonna have to start feeding 1, 2 and maybe 3 mice one after the other (adult mice don't get very big)... not very convenient for either of you and even less convenient for your wallet.
Try to find a Rat pup (baby rat) to feed it to.
Keep on listening to the people here, they really know what they are talking about.![]()