I guess if you don't have a choice, Mice will do the job. To me, Mice are the fast food of the feeder world. Rats would be a much more meatier meal and offer more nutrition.

I also don't really believe in stack feeding. Snakes are not designed to eat multiple meals at once and 2 or 3 of the same type of feeder does not mean the break-down and digestion rate will be the same for all three.

One proper sized meal is better then many undersized meals in my opinion. On top of, I don't see 3 Mice being as good as one rat still.

Just my thoughts on the topic.