I just went through a horrid stifle (both) issue. My 2 year old locked badly. Lunging him he would catch and fall down.Had surgeries. Nothing was working. I lost him too congenital renal failure after all the expense and pain of trying to get him sound. He was Very well bred and gorgeous.
What I have gained from this heart break is this. The reason minis, ponies and horses in general get locking stifles is from being moderate to severly "cowhocked". Being "sickle hocked" added to cow hocked is disaster!
Since my loss I am very aware of the legs of minis almost obsessed
Being cow hocked puts misalignment with the hip, stifle and hock. I have seen puffiness in the stifle area on a cow hocked mini.
My mare is slightly cowhocked and ocassionaly locks. Not severely like my colt did.
When I went looking for a new colt I made dang sure he was straight and correct! He is related 3x to my deceased colt through Bond Dynamo and Bond Sir Galahaad both by Bond Showboy. My new colt whom I have owned a year now has never had any stifle or lameness issues. I may be on to something...hmmm
The topside of my deceased colt traces to early Shetland blood and some dwarfism. He had a top bloodline that is famous and their top stallions are severly cowhocked. Think I know where it came from? A cousin to my deceased colt close up too also had severe cow hocks. He locked up while driving in a show and panicked and flipped his cart over!
No one was hurt thank God. Unfortuantly this person sold him to someone else out of state and did not disclose his stifle issue. Makes me sick...
Anyhoo just my experience