How much do I feed?

[DennisM]

Rule of thumb is 10-15% of their body weight.

an even better rule of thumb, I think, feed her something about the same girth she is at her thickest. a far less known rule of thumb (because it's my personal experience, not a community consensus); if it takes the snake more than 15 minutes to ingest the meal once started, the meal is probably larger than necessary. if it takes the snake less than 5 minutes to ingest once started, the meal is too small.

[DennisM]

an even better rule of thumb, I think, feed her something about the same girth she is at her thickest. a far less known rule of thumb (because it's my personal experience, not a community consensus); if it takes the snake more than 15 minutes to ingest the meal once started, the meal is probably larger than necessary. if it takes the snake less than 5 minutes to ingest once started, the meal is too small.

PS, the 10-15% prey/snake ratio is generally accepted for hatchlings. the snake in question here is 1.5 yrs and 3 ft. We don't know it's weight.

to the OP, I'd say it's likely your snake is due for an increase in prey size. give it a try, she'll let you know.