Getting separated meshes to use the same armature (clothes and hair moving with body ex) When I made my character model I made it as 3 seperate objectes: one for body one for clothes and one for hair. I then joined these objects using the 'ctrl + j' command. 
 

I have created armature but the manipulating the armature only moves body + objects that are connected with the body(ears).



I'm not sure if I should somehow separate these objects again and give them their own armature (seems kind of labor intensive)

Or if there is a way to 'merge' the meshes so they are all connected and can move along with the poses.
If anyone has any guidance or can point me in the right direction it is greatly appreciated. The similar questions I have found differ in the fact that the user is using separate objects while I am using one.

Thanks!
I would parent the object to the a bone that makes sense and then just make sure that bone is has full influence over it.