Hello I recently adopted two ball pythons and the previous owner said that they were eating adult mice. So I had purchased a couple adult mice, anyways I fed them for the first time last week, and while the mouse was the same size of the snakes head it wasn't now where near the girth of the widest section of either of the snakes. I was wondering what size they should be fed, and I would like to get them on rats because I plan on breeding rats. I wieghed them today and the one was 19.7 oz or 558.4859 grams and the other was 30.4 oz or 861.825 grams. Thank you for your replies.