The adult jumbo mice can be pretty big. I got an order of them from Layne Labs and most of them were around 50 grams.
Photo proof.
I don't think it costs more to feed your ball python mice over rats. Going off of what I read people feed small rats to their adult males, and according to Layne Labs website a small rat weighs 70-95 grams and when bought in an order of 20 each rat costs $1.95. Now an order of 25 jumbo mice is $.85 per mouse and even if you feed two at a time its going to cost you $1.70. Maybe I've just gotten lucky on my orders of f/t mice and they're bigger than normal.
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