I have a 3000+ gram female cinnamon. She is only three years old, and gets one large just weaned rat every seven days. May seem like a small meal, but she does great on it and is still growing. She does also bat clean up whenever someone else doesn't eat, so once or twice a month she gets 2 of the large just weaned rats. She also gave me 7 healthy eggs at 2 years old and 1800 grams though so she is pretty exceptional.