At an english barn I cleaned stalls at they had this pony that busted his shoulder pretty bad an had to be on strict stall rest for 6 months.
He went from sweet as can be to meaner then a rattlesnake with its tail in a mousetrap...

"Blessed are the flexible for they shall not get bent out of shape"
"You can discipline and Discourage or you can Discipline and Encourage"
"Gentle in what you do , But firm in how you do it"