Real stories from families who've lost dogs to drug sensitivities. Community support, vet visit checklists, and the information we wish we'd had.
In March 2019, my beautiful Collie Cooper was given Ivermectin for a skin condition. The vet meant well. I trusted her completely. Neither of us knew that Cooper carried the MDR1 gene mutation that makes certain drugs deadly for Collies and other herding breeds.
Cooper was gone within 48 hours.
I spent months blaming myself. Why didn’t I know? Why didn’t the vet know? Why isn’t this common knowledge when it kills dogs every single day?
This isn’t a medical website run by scientists in white coats. This is a community of dog owners who’ve held their best friends as they slipped away, often because of a medication that should never have been prescribed.
We share our stories because each one might save a dog’s life. We share what we learned too late so you can learn it in time.
“I found this community after losing my Sheltie Bailey. Reading other families’ stories - knowing I wasn’t alone in my grief and guilt - that’s what got me through. Now I make sure every vet I see knows about MDR1 before they touch my dogs.” - Jennifer M., Michigan
Real stories from real families - No sugarcoating. No clinical detachment. Just honest accounts of what happened to our dogs and what we wish we’d known.
Practical tools - The vet visit checklist I wish I’d had. The questions to ask. The drugs to refuse.
Community support - Groups and resources where you can connect with others who understand exactly what you’re going through.
The information your vet might not have - We love our vets, but many don’t know about MDR1. That’s not their fault. It’s a gap in veterinary education we’re trying to help fill.
These are the medications that most commonly cause fatal reactions in MDR1-affected dogs:
There are many more. Before any medication is given to your Collie, Aussie, Sheltie, or other herding breed, ask: “Is this safe for MDR1 dogs?” For most of these dangerous drugs, safer alternatives are available - you just need to know what to ask for.
A simple cheek swab can tell you if your dog carries the MDR1 mutation. It costs less than one emergency vet visit. It takes five minutes. It could save your dog’s life. Our MDR1 testing guide covers everything from ordering a kit to understanding your results.
For detailed scientific information about MDR1 testing and the genetics behind this mutation, visit our partner site The Herding Gene for research-based guidance.
Every single one of us wishes we’d done it sooner.
When your MDR1-affected dog needs surgery, preparation can mean the difference between a safe recovery and a life-threatening reaction. Here's everything you need to plan before the operating room.
Internal parasites are a real health threat. So is using the wrong dewormer in an MDR1-affected dog. Here's how to handle both safely.
Your dog survived a drug reaction. Now what? The steps that come after the crisis — medical recovery, documentation, reporting, and how to move forward.
You know about MDR1. But what about your partner, your parents, your dog sitter? Here's how to transfer this potentially life-saving information to everyone in your dog's circle.
Older herding breeds face more medications, more procedures, and more health challenges — and MDR1 risk doesn't decrease with age. Here's how to protect your senior dog.
Your vet knows about MDR1. But what about the people who care for your dog when you're away? Here's how to protect your herding breed outside the veterinary setting.
You need your vet to take MDR1 seriously. Here's exactly how to have that conversation — what to say, what to bring, and how to handle it if they push back.
I started this community after losing my boy Cooper in 2019. He was given a medication that should never have been prescribed to a Collie. The vet didn't know. I didn't know. And Cooper paid the price.
This site exists because no family should have to go through what we went through. We share our stories, our grief, and most importantly, what we wish we had known.
Read Our Story