ESPA/DSLD is a systemic disorder:
Histopathological examination revealed the presence of excessive amounts of proteoglycans in the following tissues removed from DSLD-affected horses: suspensory ligaments, superficial and deep digital flexor tendons, patellar and nuchal ligaments, cardiovascular system, and sclerae.
So it sounds like he doesn’t have it, but ESPA/DSLD does not just effect the suspensory ligaments, but also effects other ligaments like those of the hocks, giving a post legged appearance: http://s450.photobucket.com/albums/qq222/ozolkalni/22-07-09Daugav/?action=view¤t=PICT4416.jpg
That’s great that it sounds like you are well informed and know what you are getting into! That is good that he has already been tested and is negative, but DSLD tends to afflict warmbloods over the age of 15, or horses are subjected to intense work loads, or have sustained a prior suspensory desmitis (injury). He is 17 years, I think? Yes, there have been approved stallions that have had DSLD, so it is possible that yours has it, approval for breeding and all.
DSLD research is relatively new (last 10 years), with most of the research being conducted in the US. I did not know they had DSLD tests over there. What University did the testing?
but not him, not his offsprings (10, registered, checked, oldest from 1997) have no DSLD.
Did they use Flexion and Ultrasound, or Blood Iron Testing, or Tissue Diagnosis to do the tests?
Over 90% of the time DSLD starts and predominantly affects the suspensory ligament (SL) branches
It is highly unusual for a horse to have BOTH suspensory ligments torn. The only way to determine if the suspensory ligaments are torn is to have a veterinarian ultrasound them. If they are indeed torn, that can be a product of having DSLD.
What distinguishes DSLD apart from just an injury is the progressive, continual enlargement of the suspensory ligaments, primarily in the branches, over time, in more than one limb
What stud book is he approved in and do you know why he was not used more for breeding? He is 16 years+ and approved, but why does he only have 10 offspring?