I'm a bit worried...

My mare has started doing something she never used to do. When i'm riding her she'll drop her head down to the ground constantly, especially at the walk. I'm worried that she might have something funny going on with her neck/throat or that she may need her teeth done. I really don't know but would love some thoughts!

My mare used to do this, turned out she had a sore back and by putting her head down she was stretching out her back. A couple of visits from an equine massuer made her 100% better.
Have you felt along her back to see if she's sore?

Thanks for the reply! That makes sense! She's young, and has had a lot of intense training recently, no surprise that she's sore. Thanks, going to have the chiropractor come out

Many things:
1)Back pain
2)Smelling ground for poop or other horses
3)Colicing
4)Getting ready to roll
5)Looking for food
Etc..