I want to know this because I spontaneously turned into a vampire but the Dawnguard still gives me quests? I dislike being a vampire and want to be a werewolf.
Yes, you can still join them as a werewolf.
The Dawnguard, as an organization, are completely dedicated to hunting down vampires. Being a werewolf doesn't matter to them in the slightest. As long as you're not a vampire, they're okay with you joining up.
You will, of course, need to not have joined up with the Volkihar Clan in the Bloodline quest. If you've outright sided with their enemies, they're not very forgiving, and will still consider you the vampires' ally, even if you get yourself cured of vampirism.
Actually if you are a vampire it depends how you became one. If you became a vampire during the quest where you had to choose between the vampire and the dawnguard then they will be forever hostile to you. If you become a vampire later they will be hostile to you but if you cure yourself of vampirism (by becoming a werewolf for example) they won't be hostile to you any more and you can take quests from them again. And they never care at all whether you're a werewolf or not. Note: more information here http://www.uesp.net/wiki/Skyrim:Dawnguard_(faction)
Absolutely I had a conversation with Isran while in werewolf form, he didn't even react when my character reverted in the middle of it
protected by SevenSidedDie Feb 22 '15 at 22:27
Thank you for your interest in this question.
Because it has attracted low-quality or spam answers that had to be removed, posting an answer now requires 10 reputation on this site (the association bonus does not count).
Would you like to answer one of these unanswered questions instead?