i don't have any set schedule for weighing, but i generally try to get a weight a day or two before feeding if they have defecated that week. i also like to weigh after a shed--they are likely to have pooped along with the shed and mostly likely didn't eat during the few days before the shed occurred.

it is amazing how quickly they can grow though. one of my girls (norah) put on 600 grams in 2 months over the summer and then another 400 grams in the 2 months after that. she'll be getting to know a certain male albino of mine this winter for sure.