User blog comment:ARZC/Mastering the devil fruits/@comment-4618942-20120307203118/@comment-4820500-20120308001745

actually I'm sure it takes more than just transforming into the three forms to master a zoan, idr where exactly but I'm sure I saw a zoan user with only their arms transformed into the animal so I feel that mean in order to master a zoan the user would have to be able to have a isolated change of part of their body. Also there are the cases of the "awakened" zoans which we don't know what "awakened" officially means but its hinted that they are on a different level than other zoans