< it was probably me who said that 
All 35 of my Ball Pythons eat mice. The adults get 4-5 medium adult mice if they are bulking up after laying, and normally they get 2-3. The males get 1-2 because I want them lean but muscular. Fat snakes don't breed well, or at all. I go through about 60-65 mice a week, skipping a week here and there to keep the snakes on their toes(spurs?).
50g of mice is the same as a 50g rat, except maybe fat content, but if you're comparing fat content, is it healthier to eat a lean sirloin(mouse) or is it healthier to eat brisket(rat)?
Both prey items work well as feeders and the snakes grow equally well on either. One of my females is actually overweight and has passed her pre-breeding weight of last year. She laid in late May
So she's getting cut way back to 1-2 mice a week until I start cycling everyone in January/February.
And Jen, that female may just be small-statured. I have one 05 female who came to me at 450g. She ONLY eats mice and would only eat 1 at a time, maybe every other week. After I stuck her in a 15qt tub, with the heat at 95/84, and gave ger a hide. She's now shooting out of her tub to get those mice, and taking 3 in a sitting. She's up to almost 800g now. I just treated her like a WC, no handling unless I had to clean, and she eventually turned around. This is a CBB female too.. I prefer my CH girls over her any day. Some snakes will just be big pains in the rear.
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-Becky Brown, RVT-
1.0 Lemon Pastel Classic Jungle(NERD)
1.0 Black Pastel
2.13 Normals
1.0 NERD Yellow/Green Hypo
1.1 Spiders(BHB)
1.1 Yellowbellies(BHB)
1.0 100% Het Pied Classic Jungle(Don Kaye)
0.1 50% Poss. Het Pied(Gary Kettring)
0.1 Classic Jungle
1.0 66% Poss Het Ax Genetic Granite(VPI)
18 07 Hatchlings