How do I get faendal to heal? I don't use magic but I've given him potions that he won't use.

Any ideas?

Followers use potions now? I assumed that they just knelt when seriously hurt until the battle was over, or until a sufficient period of time without being harmed was passed

I think bandits use potions at times so followers could too.

Serana actually took the blood potion I gave her! I suppose it's the same with other followers.

I use Healing Hands. On occasion Annekke uses potions.

However, because she's at her max level now, very few enemies can even cause her damage.