Originally Posted by MeganJoey57
No it was definitely not the flemin. But yes, clacking his teeth together! He didn't have his ears pinned and he didn't seem uncomfortable or anything, that's why its so weird to me'
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I used to work as a vet tech with racehorses and many around the 2 year old mark, once they started their training etc, would do this (horses would trailer in to our facility for scoping/ lameness check/ fluoroscoping so this was a very stressful experience for some youngsters). They would kind of lift up their top lip just a little and kind of grind/ clack their teeth together. This is generally a stress response when young minds are learning new things.
Nothing to be worried about, some horses just cope differently with new scenarios, especially when they are having a tough time understanding what you are asking.
If it becomes a constant thing though, it could result is grinding down the front teeth further than they should be (similar to a cribbers teeth).
Once a bit is introduced it may help break the habit, especially if there are rollers etc on the bit for something for him to kind his mind busy.