My horse has started doing this "jaw stretching" sort of movement, and I'm not completely sure why..
Here's a description of this jaw stretching-
He opens his mouth, tenses up his jaw, and sort of bobs his head forwards, then sort of jerks his head back and repeats.
He does this when I'm riding as well, but up until recently I thought it was his way of playing with the bit, but now that he started doing it without the bit , I'm sort of confused
Does anyone know why he might be doing? Is it just a stress thing?
He gets his teeth done every 6 months. He had them last done at the beginning of January