I have a young horse we just found out has an old hock fracture.  she isnt super lame on it and cant really see anything visiually.  You can tell a little riding.  Vets suggest just inject and go on.  Anyone has any expereince with one?  Maintenace, supplements?  

Growing up years ago, (like 60+ years ago), I had a friend whose horse fractured he hock. Not much known about fractures then!  Her horse out ran everyone pretty regularly.  There was a pear tree in their pasture and when pears would get ripe, her horse would stand on her back legs and pick pears!  That mate was pretty bad to the bone. 

I hate that for you. I guess there's variables. How young? How lame? How much riding? What are your goals? 

An old hock fracture that's relatively "quiet" actually isn't super rare, especially in young horses that have had a pasture injury no one caught early on.  The fact that the vets are recommending injections and "go on with her" is actually a good sign.  It means they don't see catastrophic instability or active bone remodeling that would require surgery or aggressive intervention.  Injections can help calm inflammation inside the hock joint and reduce pain from any arthritis forming around that old fracture.  I would also recommend a good oral supplement to help prolong the time between injections and slow down arthritis. 

I had the same thing happen.  I was running him as a five year old and he was doing decent but something was off.  Had him looked at and he had an old hock fracture.  He told me to inject him and run him.  I did and he seemed great.  The next year we just injected again and he went from 1D in the spring to 4D mid summer.  I hauled him to a really good vet in Canada and he recommended surgery.  We did the surgery and he recovered 100% just has a less than nice looking hock on that leg.  Keep an eye on it I would say.  They can change in a hurry at least mine did.