Has anyone dealt with this issue on their horses?  

I see it a handful of times a year.  

What is your nomal protocol?  Do you recommend that they be tested for it to confirm.

It was mentioned by my vet a while back as a possible reason for ligament healing difficulties.  However, the horse is now fully healed and seems to be doing well in my no more previcox experiment.  I am praying he won't ever turn out like some of the horses I saw when first researching this.

OP... in my research I came across a vet doing research trials with feeding programs for DSLD horses.  Google Dr. Kellon and dsld- you should find lots of info.

Theyve also been associating PPID with ligament injuries/non healing ligament injuries so that may be something else to look at.  

TBH most of the time by the time I see a horse with DSLD the suspensories have already failed and theres no going back.  I would say if the horse has healed and isnt on pain meds anymore, you could test for it just to see but IDK, guess it depends on how much you want to spend.  The Dr. Kellon's website has a lot of links and such and one thing that continuosly is reiterated is the fact that DSLD is incurable, so keep that in mind.  I would sure hope your horse just injured its suspensory and doesnt have DSLD.  If doing the nuchal ligament biopsy would give you peace of mind, then I wouldn't say not to do it. 

Thanks, that is super interesting!  I will keep my eyes open for PPID signs.

I chose not to do the test.  Lord knows I have spent enough money on him already!

Yes I did find Dr. Kellon's site and a lot of information there.  I have two older horses one 24 and one 30.  They are not lame/lame but they do have trouble when they have been laying down and being stiff when they get up but they both walk out of it.  They both have swelling in the hind end ankles.  They looked dropped sometimes and then sometimes they don't.  Both have trouble when being trimmed by the farrier.  I just have been noticing that I think the farrier needs to take a little more toe off.  

What does the test for this involve?

it is a biopsy of the nuchal ligament.