I have had my 3 month old BD for about a month now... My other dragon has shed twice already hes 4 months old and she hasn't shed once... she looks greyish like she should shed soon but i was wondering what the norm is.
Babies usually shed every couple of weeks and that is always a good sign that they are eating well, growing good and happy. You mentioned that one is 3 mo old and the other is 4 mo old, are they housed together? If so, that could very well be the problem.