If you're worried about your little one getting used to being held and being tame when it's larger, you're probably doing just fine. I have 15 juveniles under 50g (though not for long...some are getting big!) so it's tough to give them all much attention outside of cleaning and the occasional quick weigh-in. Most seem to be getting used to handling regardless of how often I hold them, and it seems like the larger they are the more they tolerate being held.