You can cut them now, I have to do it at this age with my English Spots, their nails are razor sharp! They not only hurt anyone who handles them, but I have had a bunny scream after scratching herself too hard, so I'm sure it's more comfortable for them. You have to be VERY careful though, as there isn't much nail there and you don't want to cut the quick, just cut the very tip of the nail off. If she gets too stressed stop and give her a break and try again later.