How much does she weigh? General rule of thumb has been 10-15% of the snakes body weight. I feed babies (under 6 months) every 5 days, Juvies (6m to breeding age) every 6 days and adults (breeding age) every 7 days.

Example - I have a 1483g female I rescued a few days ago - I'll be feeding her a rat that weighs around 140 grams. Its about 10% of her body weight.