In the past few days Tango has been doing this weird thing with her mouth. She'll kind of curl her lips back and show her teeth and stick her tongue out a little. Not towards me or with her ears pinned, so no, she's no being aggressive (this horse doesn't know the meaning of the word aggressive). She doesn't do it constantly, say once in a "walking spree", but it's been going on a few days. It's almost like a yawn, or like she's stretching her jaws, but...I don't know. I've never seen it before, is it something I should worry about? Is it possible she got kicked or something and is hurting, or her teeth are bothering her? My dad refuses to call the vet unless I can prove it's something serious that needs attention, so...no help there >=( Has anyone ever seen this sort of thing?