I'm referring to the one where you measure from the coronet band to the gap in the knee, then convert inches to hh. Have you used it on a young horse and found it accurate? What is the youngest/oldest horse you have tried it on? I tried it on a few previous horses. One was a yearling filly that tested 15.2hh. She was 15.1hh at 3, which was when I sold her. The next one was tested at 8 months old, he tested 16hh and was 15.3hh when I sold him at 3.
the latest ones were the three fillies that came from the auction. I'll list them separately:
1)my filly. Grullo, found out she's pure quarter horse, sire was 16hh, dam somewhere over 15hh. 5 months old, currently stands 12.2hh. String tests 16hh.
2) palmino filly, POA breeding, but grade.figure about 4 months old. Stands 11.2hh, string tests 14.2hh.
3)sold as grade. Chestnut with lace edged high white stockings and blaze. About 6 months old. Stands 14hh, string tests 17.3hh. She is huge. We guessed maybe a paint x tb, but have no idea. She doesn't look like she has any draft in her at all, no dish to her face, elegant mover. Reminds me of a thoroughbred cross or warmblood.
It will be interesting to see how they mature. What are your experiences.