I’ll share my personal experience of my last two young mares that started in the ‘NQR’ bucket.
Both of my mares never actually presented with soundness or lameness issues - their challenges arose with contact, bend, and balance as my clues. I think it’s important, when dealing with these types of ‘NQR’ to calibrate against their typical personalities, work ethics, stoicism, etc within life. Both my mares were hard working, eager to please, people-oriented. Both mares were forward and fiesty “leader” personalities, so it was in their nature to escalate and / or revert to speed when faced with a challenge. Neither horse was spooky, but both became increasingly spooky as their performance worsened.
I waited until I saw enough of a pattern in their NQR “symptoms” to warrant minimal diagnostics. For those I do:
- Hoof rads
- Pull bloods for Lyme, EPM, Vit E
- Vet check flexions and neuro (I have a terrible eye, so need my vet to be my eyes)
- Chiro assessment of body tension / soreness
- Ulcer check / treatment
- Maintain for dental and check saddle fit
If those are all clear, then I progress with conditioning and strength training until things improve or deteriorate significantly enough to give me clues as to what I’m chasing.
ETA: For both mares things deteriorated significnatly. For one, it turned out to be kissing spine that even surgery couldn’t correct. She retired at 6 to live in a field. For the other, we we chased for 18 months, ultimately diagnosed through elimination & “treatment” on PSSM2. Have that mostly managed (flares occasionally) and she’s a wonderful low level dressage, eventing, trail horse