02/14/2025
Let's talk about health testing! There's been a lot of discussion about health testing recently including a ton of questions from people new to the breed looking for puppies.
I've gone over this before in my tiktok on how to find a silken breeder and verify their health testing, so here's that link again for a quick 3 minute video from 2021: https://www.tiktok.com//video/7021207094007221509?is_from_webapp=1&sender_device=pc&web_id=6917689263748449798
There are a couple kinds of health testing. One kind is MDR1 (a drug resistance from herding breeds that we have) and CEA (an eye issue also typical in some herding breeds) testing, which embark is one of the labs for. I embark all my puppies in case anything weird pops up, and because I like to have genetic COI (coefficient of inbreeding) and other information from it. There are other labs with cheaper single tests available that are also fine, they just don't give any extra info! If both parents are clear it's likely the puppies are clear unless a lab made a mistake testing the parents!
The second kind of health testing is OFA (Orthopedic Foundation for Animals) testing. OFA is just a non-profit database that logs results so they'll exist available online until the heat death of the universe/choose your end of humans scenario. Required OFA health testing for silkens to get a CHIC (Canine Health Information Center) is basic cardiac (this is a vet listening to the heart with a stethoscope - auscultation), thyroid, and eyes. They don't have to pass the tests to get a CHIC number. To my mind auscultations are a very low bar for cardiac testing since we come from two breeds with cardiac issues, so I do advanced cardiac testing (echocardiograms) and holter monitoring on mine, and look for studs with echos (& holter studs I use since I bought my own). Auscultations can only hear a murmur, and can't diagnose anything.
Ideally individuals would be bred when they're a little older to know if they have any health issues (3+ years) and after they've had a couple full rounds of health testing. Then ideally they would also be retested semi regularly as they age so we could have an idea of what conditions are coming up in senior silkens!
I did Minx's third echo (her fourth round of cardiac testing) in January with her having turned 9 in November, and while she did not have a murmur (so would have passed an auscultation and been marked normal on OFA if I just did basic testing) the echo showed that she does has a little stiffness and thickening in her tricuspid valve with some trace regurgitation (aka a tiny amount of blood flows back through the valve when it's closed), and an even smaller amount of regurgitation in her mitral valve. I'll be doing follow up echos on her once a year to monitor. Attached is a screenshot of her OFA record.
Both of my previous two silkens likely had this at an earlier age than Minx, since I didn't do an echo on them until our regular vet heard a heart murmur on both of them at their exam when they were 9 years old, and they both had a higher amount of regurgitation found at their initial echos a few months later.
Every breeder has different ways of doing things and every person interested in the breed needs to figure out what's important to them in a breeder!