One thing about me is if it hasn't happened to me I will keep my mouth shut. So, the stuff I said has happened to me at least once. I am giving warnings as to what can happen. Sometimes everything works out fine. Getting balls off a mouse addiction can be a pain. I do have some that will take both no problem, but as a general rule once they are on rats they stay there. With the number of animals I have, feeding adults mice just wont work. At the end of the day you have to do what you have to do. Sometimes I have issues getting the right size rats for hatchlings. WHen that occurs I have to get mice, my rule though is they are not sold until they are on rats. Without knowing your animals I would give you a 75% chance of succeeding. You just have to accept that there is a 25% chance of a problem and it is not your fault. SOme of these animals can be really stubborn.
Kill the prey before it is frozen.