What
@JanS said.
Correlation is not causation on DCM markers.
We really dont know how it works but lots of science is being done, in genetics.
Responsible breeders start doing the actual physical tests that show early symptoms or indicators: echo and holter at 2, and every year after.
If you are "only a pet owner" but want peace of mind for a heads up on first signs, or ideally a "clear"
then you can realistically plan to do so at age 3, seems to be the latest consensus.
The very experienced cardio dr I got via a referral to the cardio clinic, from my Vet -
said it "would be reasonable to do echo/holter on a pet every other year if no symptoms, maybe addd the NT-probnp blood test in off years as an addition to auscultation" by experienced vet.
Bionote's Vcheck Canine NT-proBNP test is a biomarker for the diagnosis of heart failure. Learn how you can diagnose your patients in-clinic and sooner with Vcheck.
www.bionote.com
There is a lot of discussion on DCM here and elsewhere if you search. I like the DPCA annual seminars hosted for breeders with scientist-vets giving "best practices" guidance.
Here is "how to create you DCM health plan"