September 14: Very deep sulcus thrush. The frog is completely absent. Horse very unsound, conistently landing toe first even in soft footing.
December 5: frog about a third grown back, but deep crack in sulcus remains. Horse still unsound and landing toe first most times, Occasionally landing hoof level in the best footing at walk.
January 22: Frog showing definite signs of improvement.
Example of a healthy frog. The depression in the center of the frog is as it should be, about the depth of a thumbprint.