Recently my mare has started to make funny faces after I ride her. She yawns real big and sticks out her tongue. She then spends the next 5 minutes alternating between this and licking her lips/chewing on her tongue. I bought her just over a year ago from a not so good situation and she has come along so well. She has never been one to be very mouthy - doesn't really work the bit much and never really foams up. I have her in a copper roller egg butt. A couple months ago I started asking her to be more round and take the bit better. I noticed this behaivor shortly after. The first time I thought it was cute, now I am worried there is something wrong. Her bit is clean and free from debris. She had her teeth done less than a year ago and hadn't had it done for many years before that and the dentist said they were in great shape and barely needed anything. I have since moved and have a new dentist coming out here soon. Anything else? She is riding just fine and not balking at taking the bit, so I doubt it is pain. The bit has also started squeaking when I put proper contact on it and ask her to be more round and on the bit. Thanks!