MDR1 Dog Tag
Size Guide
🐾 Find the Perfect Fit!
🐈 Small - 24mm / ⅞". Tailored for your pint-sized pals, ideal for those furry friends under 22lbs (10kg).
🐕 Large - 34 mm / 1¼". For your big-league buddies, designed to accommodate pets weighing 22lbs (10kg) and beyond.
MDR1 dog tag designed for drug sensitive dogs - helping prevent incorrect medication when it matters most.
Dogs with MDR1 sensitivity can react badly to certain drugs. It’s not something you can see, and it’s not something others will know unless it’s clearly communicated.
This medical alert dog tag helps communicate your dog’s condition quickly - especially in situations where giving the wrong medication can cause dangerous reactions.
Your dog may look completely healthy; but that doesn’t mean they can safely be given standard treatments.
Some dogs are tested as MDR1 “mutant” or “affected”, meaning they are more sensitive to certain medications and require extra care.
With space for personalised details on the reverse and 36 colour options to choose from, it’s easy to create a tag that’s both highly visible and tailored to your dog. Built for everyday wear, this durable, waterproof MDR1 tag is designed to stay clear and readable through walks, play, and all weather conditions.
Because medication isn’t something you want guessed - choose a tag that makes your dog’s needs impossible to miss.
HOW TO PERSONALISE YOUR PET TAG
Personalise your dog’s ID tag so their details are clear, easy to read, and ready for real life.
🖊️ Front: If applicable, add your pet’s name (up to 10 characters)
🖊️ Back: Include up to 5 lines of text (20 characters per line)
🖊️ Add important details like your phone number, address, and any medical needs
🖊️ The more text you include, the smaller it may appear - but it will always remain clear and readable
🖊️ Prefer no personalisation? We can print the same design on both sides for a clean, double-sided look
🖊️ Your chosen colour will be used on both sides for a consistent finish
BUILT FOR EVERYDAY WEAR
Designed to be clear, durable, and ready for real life - whatever your dog gets up to.
✔️ Double-sided design for clear, easy-to-read information that lasts
✔️ Durable domed finish made with high-quality resin for long-lasting wear
✔️ Strong and lightweight, built to handle zoomies, playtime, and daily adventures
✔️ Waterproof and UV-resistant, so it won’t fade or wear down in the elements
✔️ Easy to wipe clean, keeping your dog’s ID tag looking fresh
DOG & CAT TAG SIZE GUIDE
🐾 Finding the Perfect Fit!
🐈 Small – 24mm (⅞")
Ideal for smaller dogs and cats, typically under 10kg (22lbs)
🐕 Large – 34mm (1¼")
Best suited for medium to large dogs, 10kg (22lbs) and above
MDR1 Dog Tag FAQs
Frequently Asked Questions
What is MDR1 in dogs?
MDR1 (Multidrug Resistance 1) is a genetic mutation that affects how certain dogs process specific medications. It impacts the body’s ability to safely handle some commonly used drugs, meaning standard treatments can cause adverse reactions in affected dogs.
What does “MDR1 mutant” or “affected” mean?
Dogs described as MDR1 “mutant” (often written as mutant/mutant) have two copies of the gene mutation and are the most sensitive to certain medications. These dogs require extra care, as reactions can occur even with routine treatments.
Why does MDR1 matter in an emergency?
Because MDR1 sensitivity isn’t visible, a vet or anyone trying to help won’t know your dog has this condition unless it’s clearly communicated.
In situations where medication may be given quickly, that lack of information can lead to the wrong treatment being used.
Which dogs are affected by MDR1?
MDR1 is most commonly found in herding breeds such as Collies, Australian Shepherds, Shelties, and related mixes - though it can appear in other breeds too.
If your dog has been tested and carries the MDR1 mutation, clear identification is important.
What should an MDR1 dog tag say?
Clear, simple wording works best. “MDR1”, “Drug Sensitive”, or “Check Medication Before Treatment” helps ensure anyone handling your dog knows to take extra care.
Why Medical Alert Dog Tags Matter
Medical alert dog tags aren’t just identification - they can be vital in an emergency. Clear, visible information helps others quickly understand your dog’s needs and respond appropriately when it matters most.
Whether your dog has a medical condition, requires medication, or needs special care, a well-designed tag reduces confusion and ensures important details are always easy to read at a glance.
Built for everyday wear, our tags are durable, waterproof, and designed to stay clear and legible through every adventure.