MDR1 Test for Shelties

MDR1 is absolutely the right thing to be thinking about with a Sheltie — it's one of the most clinically important genetic variants in herding breeds, and roughly half of Shetland Sheepdogs carry at least one copy of the mutation. Knowing your dog's status genuinely changes how a vet should handle certain common drugs, including some anaesthetics, anti-parasitics like ivermectin, and several anti-nausea medications. The question is whether a standalone MDR1 test makes sense for your dog, or whether you'd get more value from a broader panel. Can I ask — has your Sheltie been tested for anything before, and is this mainly for peace of mind going into vet visits, or has a specific drug come up as a concern?

That's a very practical reason to test — and the dental timing makes it genuinely urgent rather than just nice-to-know. Given that you're also interested in the broader health picture, I'd skip the standalone MDR1 test. Those single-gene tests cost around £40–60 and give you one answer. Embark's Breed + Health kit covers MDR1 as part of a panel of over 250 health conditions, plus full breed breakdown, and it's currently around £100–120 on Amazon UK. For a purebred Sheltie the breed result isn't the point — but the health panel includes conditions like von Willebrand disease, progressive retinal atrophy, and degenerative myelopathy that are all relevant to the breed. You get the MDR1 answer you need before the dental, plus a much more complete picture. The turnaround is typically two to three weeks, so you'd want to order promptly. Is the timing workable for you?

Three weeks is actually workable with Embark — most UK customers report results in 14–18 days, and you can chase them if you're close to the deadline. That said, your instinct about the vet assuming carrier status is also a completely reasonable approach, and many vets do exactly that with herding breeds as a precaution. It's not wrong to say 'treat her as MDR1-positive until we know.' But if you want the actual data — and it sounds like you do, given your interest in the broader health picture — I'd order the Embark kit today. The specific product to look for is the Embark Dog DNA Test Breed + Health Kit. It's sold directly through Amazon UK, so delivery is fast even before the swab goes off to the lab.

Yes — Embark tells you the full genotype. So you'll know whether she's clear (normal/normal), a carrier with one copy (mutant/normal), or has two copies of the mutation (mutant/mutant). That distinction matters clinically: a dog with two copies needs more caution than a single-copy carrier, and a clear result means standard drug protocols apply without modification. Your vet will know exactly what to do with that information, and it's something you can share with any vet she sees in future, not just for this dental. It's one of those test results that genuinely follows a dog through her life.

Good call — order it as soon as you can so the sample arrives at the lab with maximum processing time before the dental. When the results come in, download the full PDF report and send it to your vet ahead of the appointment rather than bringing it on the day — it gives them time to actually read the MDR1 section and note it on her file. The Embark Breed + Health Kit is the one to get. Hope the dental goes smoothly.