Mine have done that several times. Of course a good part of the weight is crap..
My girls go up (with in the first 1 1/2 -2 years) around 100-150 grams a month and crap can weigh 20grams each x's each weeks feeding. Easily have 80-100 grams of waste in them and even more if prey is larger.
Sent from my iPhone using Tapatalk