Why Is My Dog Shedding So Much? Causes and What You Can Do About It
Why is my dog shedding so much is one of the most common questions dog owners ask — and the answer depends on several factors that are worth understanding before reaching for a solution. Some shedding is completely normal. Some is a signal that something in your dog's routine or health needs attention. This guide covers the main causes of excessive shedding, how to tell the difference between normal and abnormal, and what you can actually do about it.
Why Dogs Shed — The Basics
All dogs shed. It's a normal part of the hair growth cycle — old hair dies and falls out to make way for new growth. The volume and frequency of shedding varies enormously between breeds, coat types, and individuals, but no dog is entirely shed-free regardless of what some marketing claims suggest.
The hair you find around the house is mostly loose undercoat in double-coated breeds — the dense, insulating layer beneath the topcoat that releases in response to temperature and daylight changes. Single-coated breeds shed more consistently but typically in lower volumes. The shedding pattern your dog has is largely determined by genetics and coat type, and understanding that baseline helps you identify when shedding is genuinely excessive versus simply normal for your dog.
Common Causes of Excessive Shedding
Seasonal coat changes. The most common reason dogs shed heavily is seasonal transition. Double-coated breeds — German Shepherds, Labradors, Golden Retrievers, Huskies, Border Collies — shed their undercoat heavily in spring and autumn as their coat adapts to changing temperatures and daylight hours. These coat blows can last several weeks and produce a volume of loose hair that feels alarming if you haven't experienced it before. It's completely normal and follows a predictable annual pattern.
Inadequate grooming. When loose hair isn't removed regularly through brushing, it accumulates in the coat and sheds all at once rather than gradually. A dog that isn't brushed regularly during a seasonal shed will appear to be shedding dramatically more than a dog with the same coat type that's brushed consistently — because the loose hair has nowhere to go except the floor. Regular grooming redistributes and removes loose hair before it becomes a problem.
Poor nutrition. Diet has a direct impact on coat health and shedding volume. A diet deficient in essential fatty acids — omega-3 and omega-6 — produces a dry, brittle coat that sheds more heavily than a well-nourished one. Low-quality food with inadequate protein content produces a similar effect. If shedding has increased noticeably without a seasonal explanation, diet is one of the first things worth reviewing. Fish oil supplementation is one of the most commonly recommended additions for dogs with excessive shedding linked to coat condition.
Stress. Dogs shed more when anxious or stressed — it's a physiological response that produces acute shedding episodes in unfamiliar or high-stress environments. Vet visits, thunderstorms, travel, new environments, and changes in household routine are all common stress triggers. If you notice shedding spikes in specific situations, stress is likely a contributing factor.
Dehydration. A dog that doesn't drink enough water has drier skin and a more brittle coat, which contributes to increased shedding. Ensuring fresh water is always available is one of the simplest things you can do for coat health.
Allergies. Environmental allergies — to grass, pollen, dust mites, or certain food ingredients — can manifest as skin irritation and increased shedding. If shedding is accompanied by itching, redness, or hot spots, an allergic reaction may be contributing. This is worth investigating with a vet if the pattern is persistent.
Hormonal changes. Intact female dogs shed more heavily during and after heat cycles and after pregnancy. Hormonal imbalances — including hypothyroidism — can also produce abnormal shedding patterns in both male and female dogs. If shedding is sudden, severe, and accompanied by other changes in coat quality or skin condition, a vet check is warranted.
Skin conditions and parasites. Mange, ringworm, fleas, and other skin parasites can cause patchy or localised hair loss that looks like shedding but is actually a different problem. If you notice bald patches, skin irritation, or hair loss in specific areas rather than general shedding across the whole coat, this is worth investigating professionally.
Diet can play a bigger role than most people realise — this guide on foods that help reduce dog shedding naturally explains what to feed for a healthier coat.
Normal vs Abnormal Shedding — How to Tell the Difference
Normal shedding is distributed evenly across the coat, follows a seasonal pattern, and doesn't produce bald patches or skin changes. The dog is otherwise healthy — eating, drinking, and behaving normally.
Abnormal shedding may be sudden and severe without seasonal explanation, concentrated in specific areas, accompanied by bald patches, skin redness, itching, or changes in coat texture, or linked to other health changes like weight loss or lethargy. If you're seeing any of these signs, a vet assessment is the right next step.
What You Can Do About Excessive Shedding
Brush regularly and use the right tool. Consistent brushing is the single most effective intervention for managing shedding. It removes loose hair before it ends up on your floors and furniture, distributes natural oils through the coat, and keeps the skin underneath healthy. The tool matters — an undercoat rake reaches the dense undercoat layer where most shedding originates in double-coated breeds, while a slicker brush works better for surface hair removal. Our guide to the best deshedding tool for dogs Australia covers exactly which tool suits which coat type.
Build a consistent grooming routine. How often you brush matters as much as how you brush. For heavy shedders, two to three sessions per week during normal periods and daily during seasonal coat blows keeps shedding manageable. Our guide on how often to brush a shedding dog covers frequency recommendations across different breeds and coat types.
Improve diet and hydration. Switch to a high-quality food with real protein as the primary ingredient if you haven't already. Add fish oil to your dog's diet — omega-3 fatty acids directly support coat health and are one of the most consistently effective interventions for diet-related excessive shedding. Ensure fresh water is always available.
Bathe before brushing. Bathing loosens the undercoat and makes deshedding significantly more effective. A bath followed by a thorough dry and brush session removes substantially more loose hair than dry brushing alone. For heavy shedders, bathing once every four to six weeks with a deshedding session immediately after keeps on top of the volume.
Manage stress. If shedding spikes in specific situations, reducing your dog's baseline anxiety through regular exercise, mental stimulation, and a stable routine helps moderate stress-related shedding over time.
For a comprehensive overview of methods that work across all the main causes of excessive shedding, our guide to how to reduce dog shedding at home covers the full routine in detail.
Browse our range of dog grooming tools Australia to find the right brushes, deshedding tools, and grooming accessories for your dog's coat type and breed.
The Bottom Line
Why is my dog shedding so much has different answers depending on the dog, the season, and what else is going on. Seasonal coat changes, inadequate grooming, poor nutrition, and stress are the most common causes and all respond well to changes in routine and diet. Sudden, severe, or patchy shedding accompanied by skin changes warrants a vet check. For the majority of dogs, consistent brushing with the right tool, a quality diet, and regular bathing is enough to keep shedding at a manageable level year-round.