Hey guys just a cool glitch I found don't know if they will fix it or if it works for anyone else yet so give this a go if you have Dawnguard and playing a werewolf
step 1
Find a spell book of Reanimate dead (unconfirmed if any other raise dead spell works) the lower the better to be honest as you don't want to actually raise the npc
step 2
As a werewolf kill/feed upon X amount of npc (for example i was in a dungeon fighting vigilantd of stendarr) make sure you feed off everything you can
step 3
Equip spell after reverting to human form and work your way through the bodies of your slain victims using the spell on them sometimes you have to fire it twice. if their higher than the spell requirement you will claim the feeding exp required to "perk up" a whole 2nd time!
Hope this helps those wanting to quickly become a Master Werewolf
if you make a Video on Youtube about this glitch, give me credit!