Ahhh no. You may have to do some touch up to the fur after posing, but sculpting the fur for each pose is definitely not the way to go. Ideally you would create the topology of the fur in preparation for the deformation of the armature. That could take years of experience. The easier solution is to use the low poly mesh as a deform Cage for the fur sculpted mesh. This would help smooth out some of the deformation issues for the fur in my opinion.
