:)..the subject kind of goes hand in hand. Let me preface this here by saying that the equine dentist is coming out today but I wanted to see if my theory may be correct.
I noticed the horse was chewing on his buckets..all plastic, he doesn't have anything wood he can get his teeth on in the stall. Now, due to circumstances (stone bruise, coughing of potential paddock mate....) he was only getting turned out about an hour or so a day but even before I bought him he was chewing wood occasionally...just picking at it.
After finally being sound from the stone bruise, and once I got him past his pogo stick tendencies due to way too much energy and just feeling good from his foot not hurting, he has been tossing his head when I ride..and I mean nearly knocking me in the face at times. Most of the time this has started about 15 mins after I ride when I ask for more collection, which is what set the alarm bells off.
In bridling the other day, Monday I think it was, I could feel a sharp point on one of his front teeth and when I brought him in from the paddock yesterday I noticed he was chewing the fence.
I am guessing the wood chewing lead to the pointed tooth I found up front so it goes hand in hand he could have issues further back, but, I was curious as to how a sharp tooth up front would have such an impact on his head tossing considering the bit doesn't act on that area? This is assuming, of course, that this one tooth is the only problem.