Why Is My Dog Shedding So Much? Causes & Fixes

Most heavy shedding is normal seasonal coat blow – worst in spring (August to October) and autumn (March to May) for double-coated breeds. Brush daily, feed an omega-3 rich diet, and let the cycle finish. But bald patches, symmetrical thinning along the flanks, a flaky coat or sudden shedding outside the usual seasons need a vet, not a vacuum.

Most owners only ask ‘why is my dog shedding so much?’ once they can’t see the carpet under the fur. The good news – nine times out of ten, it’s a normal seasonal coat blow doing exactly what evolution built it to do. The other one in ten is the case worth catching early, because heavy shedding is one of the first visible signs of thyroid disease, Cushing’s, parasites and a few other conditions that hide under a fluffy golden retriever until they don’t.

We’ve seen both. A cavoodle owner panicking about a sudden hair drop (turned out to be a winter coat finishing five weeks late). A border collie owner waiting too long to mention bald patches that turned out to be early hypothyroidism. This guide helps you tell the two apart and gives you a real management plan if the dog is just doing what double-coats do.

What counts as normal shedding (and what doesn’t)

Every dog with hair sheds. Even ‘non-shedding’ breeds like poodles and oodles still lose hair – the hair just stays trapped in the coat instead of dropping onto the couch. Normal shed is even, doesn’t leave patches, doesn’t change the look of the skin underneath, and stops or slows once the seasonal cycle finishes.

Abnormal shedding looks different. Watch for bald spots that show pink skin, hair coming out in tufts when you pull gently, symmetrical thinning down both flanks at the same time, flaky or oily skin, or a coat that suddenly feels dull and brittle. Add a tired, drinking-more, peeing-more dog and you’re probably looking at a metabolic or endocrine cause. Time for the vet, not the Furminator.

Why your dog is shedding more right now

Five usual suspects, in roughly the order we see them at the clinic.

• Seasonal coat blow. Double-coated breeds like huskies, golden retrievers, samoyeds, Briard-style heavy long-coats and border collies drop their undercoat heavily twice a year. Dr Chris Brown explains the biology of the autumn drop – shorter days trigger melatonin shifts that signal the follicles to turf the lighter outer hair and refresh the dense undercoat. It’s seasonal, predictable and finishes within 4 to 6 weeks.
• Breed. Some dogs were built to shed. Labradors, German shepherds, malamutes, corgis and Chow Chows all drop heavily as a baseline. Low-shed picks – cavoodles, Australian Cobberdogs, maltese, schnauzers and most short-haired little dogs like dachshunds – still shed, just less visibly.
• Diet and nutrition. A coat that’s dull, brittle or shedding more than the season explains is often a diet flag. Quality protein, zinc, vitamin E and omega-3 fatty acids (EPA and DHA) build healthy follicles. A cheap supermarket kibble with low protein and oxidised oils almost always reads as a heavier shed inside 8 weeks.
• Stress. Rehoming, a new baby, a fireworks night, a vet visit – acute stress dumps cortisol, and cortisol pushes hair follicles into the resting phase. The result is a coat that lets go a week or two later. It usually settles once the dog does.
• Underlying disease. Hypothyroidism, Cushing’s disease (hyperadrenocorticism), parasites (fleas, mites, sarcoptic mange), bacterial or yeast infections, and food or environmental allergies all show up as excess shedding. The vet view on shedding is clear: persistent or patchy hair loss outside the seasonal pattern warrants bloodwork.

The Australian shed calendar

AU seasons drive a slightly different pattern from US and European guides – and most overseas blogs don’t mention it.

In Melbourne, Sydney, Adelaide and Hobart, expect the heaviest blow from late August through October as the days lengthen, then a second smaller drop from March to May. Double-coated dogs become almost unrecognisable in week three of spring. Brush daily through both windows or you’ll be vacuuming twice as often.

In Brisbane, Cairns, Darwin and Far North Queensland, the swings are smaller. Dogs there shed steadily year-round rather than in two big peaks, because temperature and daylight don’t change as dramatically. We see less drama, more constant maintenance. The trade-off is that humidity makes loose hair stick to everything, and undercoat trapped against the skin in 85% humidity is the start of a hot spot by Wednesday.

One rule that holds AU-wide: never shave a double-coated dog ‘to help with shedding’. The undercoat is insulation in both directions, and shaving disrupts the regrowth cycle, sometimes permanently. The right answer is to remove loose undercoat with a rake, not to take the whole coat off.

How to manage heavy shedding at home

Most owners can cut the visible shed by half in a fortnight. The order matters – brushing on a clean coat works better than brushing on a dirty one, but you brush before the bath, not after.

1. Brush daily with the right tool. Use an undercoat rake (huskies, goldens, shepherds), a slicker brush (curly and wavy coats) or a deshedding tool like a Furminator for short-coat heavy shedders (labs, beagles). 5 to 10 minutes daily during coat blow.
2. Bath every 3 to 4 weeks through the heavy shed. Loosened undercoat rinses out easily after a good shampoo. Use a dog-formulated wash, work it into the skin for 5 minutes, then rinse twice. A force dryer at low heat blows loose hair out far better than a towel.
3. Add omega-3s to the diet. Fish oil supplements or omega-3 chews (PAW by Blackmores, Rufus & Coco, Aristopet do AU versions) noticeably improve coat quality over 6 to 8 weeks. EPA and DHA at roughly 50 to 100mg per kg of dog per day is the usual starting range; check with your vet for skin-condition cases.
4. Vacuum more, not less. A robot vacuum on a daily schedule lifts shed hair before it works into rugs and couches. Lint rollers, a damp rubber glove run over upholstery and a microfibre dust mitt also work. Keep a roller in the car for the post-walk seat.
5. Book a professional deshedding treatment. Most AU salons offer a ‘deshed package’ – usually $25 to $80 on top of a bath-and-blow, depending on coat and size. The groomer uses a high-velocity dryer plus undercoat rakes to clear what a home brush can’t reach. Worth it once or twice through each big shed, and easier to find through accredited groomers.
6. Cut stress where you can. Keep routines steady through known stress windows (storms, fireworks, moves). Consistent walking times, a quiet sleep spot and lickmats for calming work better than telling a stressed dog to settle.

When shedding is a vet visit, not a vacuum

Stop assuming it’s the seasons and book the vet if you see any of these.

• Bald patches showing pink or grey skin underneath, especially bilaterally symmetrical thinning down both flanks, the tail or the trunk. That pattern is a classic flag for hypothyroidism or Cushing’s.
• Hair coming out in tufts when you gently pull it, or hair that snaps rather than slides out cleanly. Healthy hair resists a light pull.
• Flaky, oily or pigmented skin under the shed, sometimes with a musty or sweet smell. Often points to a secondary yeast or bacterial infection.
• Heavy shedding plus a tired dog, increased thirst, weight gain or weight loss, or a slow heart rate. Endocrine disease tends to travel in bundles.
• Persistent scratching, paw-licking or chewing alongside the shed. Allergies and parasites both shed and itch; seasonal coat blow alone usually doesn’t itch.

FAQ

Brush daily through spring and autumn, feed a coat that has enough omega-3 to look after itself and watch for the patterns that don’t fit the seasons. The shed isn’t the problem – the shed that doesn’t stop is.