Dog Coats: Everything You Need to Know Before You Buy

Picture this: the temperature drops, the wind picks up, and your pup is shivering on the morning walk. Sound familiar? If you've ever wondered whether your furry friend needs a little extra warmth, you're definitely not alone.

Dog coats have become one of the most popular pet accessories out there, and for good reason. But with so many styles, sizes, and materials to choose from, shopping for one can feel a little overwhelming, especially if you're doing it for the first time.

The good news? It doesn't have to be complicated. Whether you have a tiny Chihuahua who gets cold just looking at a snowflake or a larger breed who loves romping around in the rain, there's a perfect coat out there for your dog.

In this guide, we've broken everything down into a simple, easy-to-follow list so you can shop with confidence. From figuring out if your dog actually needs a coat to understanding what features matter most, we've got you covered. Let's dive in!

Does My Dog Actually Need a Coat?

Here's a truth that might surprise you: fur alone isn't always enough to keep your dog warm and dry. It's a super common assumption, but not every dog is built to handle cold, wet conditions on their own. Vets widely agree that while some dogs genuinely don't need extra layers, plenty absolutely do.

The key factors come down to a few things: coat type, body fat, size, age, and activity level. Single-coated breeds like Greyhounds, Whippets, Italian Greyhounds, and Miniature Pinschers have very little natural insulation and feel the cold quickly. Small dogs lose body heat faster simply because of their size. Puppies and senior dogs struggle to regulate their temperature effectively, making them more vulnerable even on mildly cool days. Double-coated working breeds, like Labradors or Huskies, tend to manage better, but they're not immune to every condition.

Where you live in New Zealand makes a real difference too. Auckland's winters are milder and wetter, while Wellington and the South Island regularly see temperatures drop below 10°C with significant wind chill on top. Wind chill is worth taking seriously because it can make the effective temperature feel several degrees colder than what the thermometer says.

Watch your dog on walks for these telltale signs they're feeling it: shivering, slowing their pace right down, hunching their back, lifting their paws off the ground, or just point-blank refusing to head outside.

And here's the thing about dogs with thicker fur: even they can benefit from a waterproof layer on wet days. A good water-resistant coat keeps mud and moisture off their fur, which means less bath time for them and a much cleaner house for you.

Which Dogs Benefit Most from Wearing a Coat?

So which pups actually need a little extra help staying warm? Here are the dogs that benefit most from a well-fitted coat.

1. Short-haired breeds like Whippets, Greyhounds, Chihuahuas, and Miniature Pinschers

These breeds are at the top of the list for good reason. Most dogs have a dense undercoat that traps warm air close to their body, topped by water-repellent guard hairs. Short-haired breeds simply don't have that built-in insulation system. Greyhounds, for example, are single-coated, meaning there's almost nothing between them and the cold air. According to Small Door Veterinary, small or thin-furred breeds can start feeling uncomfortable at or below 0°C. A snug coat isn't a fashion choice for these dogs; it's a practical necessity.

2. Small dogs, because physics is working against them

Tiny dogs lose body heat faster than larger breeds, and it's not just about their coat. It comes down to their surface-area-to-body-mass ratio. Smaller bodies have more skin exposed relative to their overall size, which means heat escapes quickly. Being low to the ground makes things worse, since cold surfaces draw warmth away rapidly. Chihuahuas also originated in the hot climate of Mexico, so they never developed genetic adaptations for cooler weather.

3. Senior dogs and puppies

Both ends of the age spectrum struggle with temperature regulation. Older dogs often have slower circulation and less muscle mass to generate warmth, while puppies haven't yet developed fully efficient thermoregulation. Damp, chilly conditions hit both groups harder, making a coat a genuinely useful piece of kit for daily walks.

4. Dogs recovering from surgery or illness

A dog recovering from something like a cruciate ligament repair is less active than usual, which means they're generating less body heat through movement. They still need regular toilet trips outside, but they're not getting the warming benefit of a good run around. Keeping a recovering dog comfortable during outdoor time is an easy win, and a cosy coat helps support that.

5. Lean, muscular breeds with low body fat

This one surprises a lot of people. Size isn't the only factor; body composition matters too. A Greyhound carries only around 16% body fat, compared to roughly 35% in many other breeds. That lean build offers almost no thermal cushion. Breeds like Boxers and Dobermanns fall into the same category. Even though they look robust, their low fat stores mean cold snaps can affect them more than you'd expect.

How to Measure Your Dog for a Coat (and Get the Fit Right)

Getting the fit right starts with three measurements, and yes, all three matter. Grab a soft fabric tape measure (the kind a dressmaker uses) or a piece of string you can hold up to a ruler afterwards. Then get your dog standing squarely on all four paws on a flat surface. Sitting throws off both back length and chest measurements, so a treat or a helper to keep things steady goes a long way here.

The three numbers you need are:

• Back length: from the base of the neck (where the collar sits) along the spine to the base of the tail

• Chest girth: around the widest, deepest part of the ribcage, just behind the front legs

• Neck circumference: around the middle of the neck, where a well-fitted collar would sit

For both chest and neck measurements, keep the tape snug but comfortable. You should be able to slip two fingers underneath easily. If in doubt about which measurement matters most, chest girth is the priority. A coat that runs slightly long in the back is awkward; one that won't close around the chest is unwearable.

Here's where a lot of people get caught out: measuring a dog at rest only tells you how a coat fits when your dog is doing absolutely nothing. The moment they start trotting, bending down to sniff something fascinating, or doing that full-body wriggle they save for greeting you at the door, the picture changes completely. A coat that seemed perfect while they stood still can suddenly pull across the shoulders, restrict leg movement, or bunch up uncomfortably. If you can, do a quick movement check before committing. Watch for any bunching, pulling, or hesitation in your dog's stride.

The chest and shoulder area is where most standard, off-the-shelf coats fall apart on active dogs. There simply isn't enough ease (extra room built into the fit) to allow for natural shoulder rotation. This is especially true for dogs with non-standard proportions. Greyhounds and Whippets are famously deep-chested and narrow-waisted. Dachshunds are long-bodied with a short reach. French Bulldogs are broad and muscular through the shoulders. Generic XS-to-XL sizing charts weren't designed with any of these dogs in mind.

That's exactly why handmade and small-batch coat makers make such a difference for dogs like these. Rather than forcing a breed into the nearest standard size, makers who work to individual measurements and breed-specific proportions can adjust patterns to match the actual dog in front of them. It's the difference between a coat that technically closes and one that genuinely fits.

What to Look for in Dog Coat Materials (for NZ Conditions)

Not all dog coat materials are created equal, and once you understand the basic trade-offs, shopping for one becomes a whole lot easier. The three big properties to think about are warmth, water resistance, and breathability. Here's the thing: these don't always come together in one fabric. A thick, cosy fleece will keep your dog beautifully warm on a crisp dry morning, but it soaks up rain like a sponge. A fully waterproofed outer shell will shrug off a downpour, but without ventilation, it can trap heat and moisture against your dog's body during a brisk walk. Knowing which conditions you're dressing for helps you pick the right tool for the job.

Fleece-lined fabrics are brilliant for dry, cold days. Fleece traps warm air close to the body and stays soft and lightweight, making it a great choice for those chilly winter morning walks when the ground is frosty but the sky is clear. The key win here is that fleece doesn't add a tonne of bulk, so your dog can still move comfortably without overheating once they get going.

For classic New Zealand weather, especially in Wellington, Southland, or anywhere near the coast, a water-resistant outer layer is your best friend. NZ's weather is famously unpredictable; a sunny start can turn into a sideways drizzle before you've made it to the park and back. Look for a coat with a treated or coated outer shell that repels light rain while still letting some air flow through.

Breathability deserves its own moment, especially if you have an active or working breed. Dogs regulate body temperature differently from humans, and a coat that traps too much heat during exercise can cause real discomfort. If your dog is a keen runner, a heading dog, or just a very enthusiastic fetcher, prioritise coats labelled as breathable or made with ventilated panels.

Finally, sustainability is becoming a genuine consideration when buying from independent makers in 2026. Look for mentions of responsibly sourced materials, natural fibres like wool, or certifications such as OEKO-TEX on the fabric. Small-batch makers who share where their materials come from are often a good sign that quality and ethics are both being taken seriously. This guide to choosing dog coats breaks down material options in more detail if you want to go deeper before you buy.

Everyday Walkies vs. Special Occasions: Picking the Right Style

Not every coat needs to do the same job, and once you start thinking about your dog's wardrobe in two simple categories, everything gets a lot easier.

Everyday Coats: Built for Real Life

For daily walks, a good coat needs to tick three practical boxes: easy to get on and off, a secure fit that stays put when your dog is trotting, spinning, or diving nose-first into a bush, and materials that can handle being washed repeatedly without falling apart. Look for adjustable closures like velcro or snap buttons, and check that seams are reinforced at stress points. A coat that fits beautifully on a standing dog but rides up the moment they move is one of the most common frustrations dog owners run into, so prioritising freedom of movement through the shoulders and chest is worth the extra attention.

The Sloane Sweater range from Clothes By Portia is a solid example of everyday done right. It's the kind of piece that covers the practical bases without being boring about it, with a considered fit and real personality built into the design. Perfect for that morning walk where function matters but you still want your dog looking cute.

Special Occasions Are a Completely Valid Category

Birthdays, photoshoots, or honestly just a Tuesday where your dog deserves to feel a bit extra? Occasion pieces don't need to justify their existence with practicality. A tutu or a statement outfit exists to bring joy, and that is reason enough.

Building a Small, Sensible Wardrobe

You really only need two or three pieces to cover most situations: one reliable everyday sweater or coat, and one or two fun pieces for special moments. That's it. No need to overcomplicate it.

And if you're wondering whether wanting your dog to have their own sense of style makes you a bit much, it absolutely does not. Pet humanisation is one of the biggest drivers in the fashion world right now, with owners increasingly treating dogs as full family members whose personalities deserve to be expressed. Dog jackets and apparel are now considered smart extensions of lifestyle and fashion brands, not just functional pet gear. Wanting your dog to look as put-together as you do is not only understandable; it's completely on trend.

How to Care for Your Dog's Coat (So It Lasts)

Once you've found a coat your dog loves wearing, a little bit of care goes a long way toward keeping it in great shape. Here are five simple habits that'll help your dog's coat last season after season.

1. Always check the care label first. This one sounds obvious, but it's easy to skip. Handmade pieces especially can use a mix of fabrics that need a gentle or cold machine cycle to hold their shape. Hot water can cause shrinkage or distortion, so cold is always the safer bet. Use a mild detergent free from bleach and strong fragrances, and skip the fabric softener since it can leave a residue that affects water-resistant properties over time.

2. Know when to spot-clean vs. do a full wash. After a muddy walk, resist the urge to immediately scrub the coat under water. Let the mud dry first, then brush off the dried bits before wiping the area with a damp cloth. This prevents rubbing wet mud deeper into the fabric fibres. Save full washing for when the coat genuinely needs it, not after every outing.

3. Air dry flat, never tumble dry. Heat is the enemy of fleece-lined and structured coats. It flattens the loft, warps the shape, and wears out the fabric much faster. Lay the coat flat to dry, and close any zippers or Velcro beforehand to prevent snagging.

4. Store coats clean between seasons. Never pack away a dirty coat. Odours set in and fabric breaks down faster when stored with grime. Give it a proper wash first, then store it flat or loosely folded somewhere dry and breathable.

5. Good care makes a quality coat genuinely better value. A well-made handmade coat looked after properly will easily outlast two or three cheap retail replacements. When you invest in something crafted with real attention to fit and materials, taking five extra minutes to care for it correctly just makes sense.

Finding the Right Coat for Your Dog

You've now got everything you need to make a great choice for your dog. Check whether they actually need a coat, get those three measurements sorted (back length, chest girth, and neck circumference), and match your material to whatever NZ is about to throw at you.

But if there's one thing worth repeating, it's this: fit during movement is the factor most people overlook, and it's the one that determines whether your dog happily trots off in their new coat or immediately tries to wriggle out of it. A coat that sits nicely on a standing dog can bunch at the shoulders or ride up mid-walk, and that's usually the end of the experiment. Always let your dog move around in it before you decide it's a winner.

If you're not sure where to start, take a browse through the Clothes By Portia range and don't hesitate to reach out with your measurements. Handmade doesn't mean complicated; it means your dog's size is taken seriously rather than squeezed into a generic S or XL box. Every piece is made with real care, and sizing questions are genuinely welcomed.

And if you need a reference point for what actually works in NZ conditions? Portia herself has you covered. She's a real dog living a real NZ life, and she's been the unofficial test subject for this whole range from the beginning. That's the kind of quality assurance you just can't fake.

Conclusion

Finding the right coat for your dog does not have to be a stressful experience. Remember the key takeaways: not every dog needs a coat, but smaller breeds, short-haired dogs, and senior pups often benefit greatly from one. Fit and comfort should always come first, and choosing the right material for your climate makes all the difference.

Now that you know what to look for, it is time to put that knowledge to use. Measure your dog, think about your typical weather conditions, and browse with confidence knowing exactly what features matter most.

Your pup deserves to stay warm, comfortable, and happy on every walk, no matter the season. Take the next step today and find the coat that fits your dog perfectly. A little preparation now means a lot more tail wags all winter long.