I have found that young horses will fuss alot with
a bit that is TOO BIG. Measure the snaffle/bristol when layed out
straight, it should be, at most 1/2 inch longer than horses mouth. Measure
horses mouth with a dowel.
Also he might be better with a straight bit with a
port for his tongue, have you access to a kimberwick to try?
Alison
Craig