Why Dogs Shed: Understanding Shedding, Coat Cycles, Hair Loss, and Coat Damage
Shedding is a natural process by which dogs lose their existing coat to allow a new coat to come in. Every dog sheds to some extent, some breeds more than others, and there are pros and cons to both heavy shedders and light shedders.
The important thing is understanding what is normal, what can be managed with routine grooming, what may be caused by lifestyle and environment, and when “shedding” may actually be coat loss, breakage, skin disease, poor nutrition, chemical damage, physical damage, or another health issue that needs attention.
Shedding Is Normal. Coat Loss Is Different.
Normal shedding follows coat cycles. Abnormal coat loss, bald patches, irritation, breakage, itching, sores, dandruff, or sudden excessive shedding may point to a deeper grooming, skin, nutrition, medical, or environmental issue.
Light Shedders Need Grooming
Many light-shedding breeds require regular coat maintenance, haircuts, brushing, and professional grooming to prevent mats and skin problems.
Heavy Shedders Need Control
Heavy shedding can often be managed with the right brushing routine, de-shedding tools, bathing schedule, and coat maintenance.
Hair Loss Needs Attention
Patchy coat loss, itching, sores, redness, dandruff, breakage, or sudden changes in the coat may require veterinary or professional help.
Normal shedding is expected. Bald spots, broken coat, inflamed skin, hot spots, parasites, constant scratching, sudden dramatic coat loss, foul odor, dandruff, or skin pain are different. Those signs may point to allergies, parasites, infection, endocrine disease, nutrition problems, medication effects, coat damage, or another issue that should be evaluated.
Shedding is a natural process by which dogs lose their existing coat to allow a new coat to come in. Every dog sheds to some extent. Some breeds shed heavily, some breeds shed lightly, and some breeds shed so slowly that the coat must be maintained with regular brushing, trimming, bathing, and professional grooming.
This is why choosing a dog based on shedding alone can be misleading. A dog that does not leave piles of hair on the floor may require more grooming appointments, more coat maintenance, more brushing, and more long-term expense. A dog that sheds heavily may require less haircut maintenance but more brushing, vacuuming, and de-shedding work.
Light Shedders
Breeds that are typically considered to be light shedders, such as Poodles, Yorkshire Terriers, the Maltese, and similar coat types, are generally also the breeds that require regular professional grooming to maintain their coats.
Because these breeds tend to shed at a much slower rate, they are much more prone to matting. Matting can lead to a variety of unhealthy skin conditions, including bacteria growth between the mats and the skin, blisters, sores, irritation, and painful pulling if the mats develop on sensitive areas of the body.
Of course, a dog that requires regular professional grooming is going to cost more in the long run to own. The average cost may be around $40.00 every six weeks for the life of the pet to have them professionally groomed and keep the coat healthy and free of matting. If the average lifespan is twelve years, then expect to spend between $3,500 and $4,500 during the course of the dog’s life for grooming.
The flip side is that by having your pet groomed regularly by a professional, it is more likely that issues affecting the pet’s health will not only be avoided, but those unrelated to grooming may be noticed sooner than would be expected from a dog that is not groomed regularly.
Grooming by a true professional is more than just grooming. It is like a mini check-up. Ears are checked and cleaned, paws are checked and cleaned, teeth are checked and brushed, nails are inspected, and the entire body from head to toe is touched or observed at one point during the grooming process. This helps bring to light items that might have gone unnoticed in a dog that is not groomed on a regular basis.
Shedders
Breeds typically known to be shedders include the Akita, Great Pyrenees, Golden Retrievers, Labradors, and many similar breeds. A lot of this has to do with whether or not they have a double coat, meaning both a fluffy soft undercoat and a coarser outer coat, or a single coat that generally consists mostly of the coarse outer coat.
The downside to dogs that are considered shedders, aside from the obvious fact that they shed a lot, is that when a dog sheds, it also sheds dander and anything else its hair may have picked up in its travels — including dust, dirt, pollen, feces, outdoor debris, and other irritants.
Anything that is on the dog’s hair while it is on the dog is also on the dog’s hair when it lands on the floor, couch, carpet, bedding, clothing, or wherever else it sheds.
Another concern with shedding dogs is that they tend to break vacuum cleaners rather quickly, as the hairs of longer-coated breeds tend to tie themselves around the moving parts of the brush, causing undue stress on the motor. The Dyson model vacuum cleaners seem to hold up the best to this particular kind of abuse.
Having a dog that is a heavy shedder is not really that much of a problem if you control the shedding with routine brushing and maintenance. A good brushing outdoors once a week tends to keep shedding under control and your house free of excessive hair. The other plus to these breeds is that they are typically lower maintenance and can often be washed outside and left to dry on their own, without the need to spend hours drying them to prevent matting.
A good rule of thumb is that a dog that requires regular professional grooming will most likely not shed excessively, while dogs with shorter hair requiring regular brushing rather than haircuts will usually be double-coated and tend to shed more.
Light Shedders vs. Heavy Shedders
Both coat types come with tradeoffs. The best choice depends on whether you prefer regular haircuts and coat maintenance or regular brushing and shedding control.
Light Shedders
- Usually leave less loose hair around the home.
- Often require regular professional grooming.
- Can mat badly if the coat is not maintained.
- May need brushing, haircuts, bathing, and coat conditioning.
- Can cost more over the life of the pet because of grooming needs.
- Benefit from routine professional observation of skin, ears, paws, teeth, and coat.
Heavy Shedders
- Usually leave more hair and dander in the home.
- May shed heavily during seasonal coat changes.
- Often have double coats with a soft undercoat and coarser outer coat.
- Can often be managed with routine brushing and de-shedding.
- May not need haircuts but still need coat, nail, ear, and skin care.
- Can be lower maintenance if owners stay ahead of the loose coat.
The Factors That Cause Dog Shedding
Shedding is controlled by biology, seasons, light exposure, environment, health, stress, grooming practices, and lifestyle.
Dogs shed as the result of a combination of factors, including the changing of seasons, lighting, stress, health issues, medical procedures, pregnancy, bathing habits, product choices, and lifestyle.
One thing to understand is that dogs do not continually grow hair. Rather, hair grows in cycles with a growing phase, a transitional or shedding phase, and a resting phase. These cycles are controlled by several factors, with one of the greatest effects tending to be caused by the amount of light they are exposed to, called the photoperiod.
Seasonal Coat Cycles
The natural phases of shedding and growing are that the growing phase typically occurs during the late summer months and early spring, followed by the transitional or shedding phase as the old coat falls out in the late spring and early fall months. During the middle of summer and winter, the coat is generally in a resting phase where shedding is minimal.
Indoor Lighting and Photoperiod
When your dog lives inside the home, this natural cycle is disturbed because the dog is constantly exposed to changes in temperature and lighting that are in direct conflict with what nature has evolved its body to handle.
In summer, when it would naturally be hot, the house dog enjoys air conditioning. In winter, when the dog’s brain expects it to be cool, we have central heat. As for regulating shedding cycles based on the shortening of daylight in winter, the house dog lives in a world of artificial interior lighting that keeps its world illuminated when it is supposed to be dark.
It is no wonder that the natural shedding cycle is disrupted and many indoor dogs tend to shed all year round.
Medical Procedures
It has also been shown that dogs that have been anesthetized for medical procedures may begin to shed their coat within two months following the procedure.
Stress
Stress is also a factor in shedding. If you have recently moved, are going through tough times, or the tension in the home runs high, dogs will pick up on this and shedding may increase.
Pregnancy and Puppies
Females that have recently had puppies tend to shed their coat soon afterward as well. This is another example of how internal physical changes can affect the coat cycle.
Bathing and Products
Other factors can increase shedding as well. The number of times the dog is bathed and the types of shampoo used can cause an increase in shedding. Shampoos intended for human use will generally contain perfumes or ingredients that can be hard on your pet’s skin, causing allergic or hypersensitive reactions that increase shedding.
Bathing too frequently can strip the coat of its naturally protective oils, drying out the coat and increasing shedding as well.
Dog Shedding and Hair Loss: What’s the Difference?
Shedding is part of a natural coat cycle. Coat loss, breakage, bald patches, or damaged hair are different problems.
Coat loss, unlike shedding, is not part of a natural life cycle. Coat loss is generally caused by underlying medical conditions, hereditary or genetic factors, or physical or chemical damage to the coat.
The vast majority of coat loss is caused by the coat being physically or chemically damaged by bleaching or whitening products, products that contain alcohol such as cheap spray conditioners, blow drying with hair dryers intended for human use, excessive combing, or generally improper styling techniques.
While coat loss as a result of genetic or hereditary factors cannot always be solved, the vast majority of coat loss issues caused by care practices can often be improved with proper diet, the right tools, and quality products designed for use on dogs.
If hair loss is patchy, sudden, itchy, painful, red, scabby, smelly, associated with sores, or paired with changes in appetite, behavior, or skin condition, do not treat it as normal shedding. That is a reason to speak with a veterinarian.
Common Causes of Coat Damage and Coat Loss
Many coat problems are created by products, tools, heat, over-bathing, poor technique, or trying to force the coat to look a certain way.
Chemical Coat Damage
Chemical-related coat loss is caused by using products such as whiteners, products with alcohol, or using products such as laundry or dish washing detergent as shampoo. All of these can permanently damage and weaken the coat shaft, making it many times more susceptible to breakage or splitting.
The safest rule is simple: use products designed for dogs, use them as directed, rinse thoroughly, and avoid harsh human or household products on the coat.
Physical Coat Damage From Heat
Blow dryers — the kind intended for human use — are another major culprit in coat loss. Human hair dryers can reach temperatures high enough to damage the coat or burn the skin, while heated units designed for pets generally operate at safer temperatures and tend to blow with much higher force, further dissipating the heat.
High heat from human hair dryers can result in even the healthiest coat becoming so seriously damaged that it splits apart and breaks off. There is also the issue of safety to consider. Your dog cannot tell you it is getting too warm until it is too late and injury has already occurred by burning not only the hair but the skin.
It is advisable to use only a force dryer with no heat or a blow dryer designed for pet use, which does not have nearly the same capacity to damage the hair or burn your pet.
Brushing to Excess or at the Wrong Times
Excessive combing, or using the wrong type of comb or brush for the breed, can damage the coat as well. Never brush a completely dry coat aggressively, as this is when the hair may be more susceptible to splitting and breaking because it is at a lower point of tensile strength and elasticity.
First use a spray bottle and gently mist the coat with a quality coat conditioner or water to make it damp, not wet. You also should not brush a coat that is completely wet, as this is when the coat is at maximum stretch and brushing or combing while wet can cause the coat to stretch to its breaking point.
The best time to brush your dog is while you are using a forced-air dryer or a hair dryer designed for pet use to dry a wet coat. You may also brush a dry coat if you first lightly mist the coat before brushing.
Always ensure that you brush the entire length of the coat shaft before removing the brush and re-entering the comb into the coat. Long, deliberate strokes as opposed to short, choppy ones help prevent coat damage.
Excessive Bathing
You are also likely to cause coat damage by scrubbing excessively during a bath, not just to the coat but also to the skin of your pet. Dogs have natural oils in the skin that help protect both the coat and the skin.
Excessive scrubbing or using products not intended for pet use can strip these oils away, leaving a dry and brittle coat that is susceptible to breakage or falling out. Once this happens, the end result can be devastating if the problem is allowed to continue, and the longer it continues, the more difficult it will be to correct.
Ideally, you should bathe your pet only as often as needed for the coat, skin, odor, lifestyle, and veterinary recommendations. More is not always better. The more you fiddle with the coat unnecessarily, the more likely you are to damage it.
Medical Conditions and Medications
A wide range of medical conditions can cause coat loss, including anemia, thyroid conditions, scaling and dandruff, allergic reactions, rapid weight loss, fungus, hot spots, dermatitis, and inflammation, to name only a few.
Certain medications such as antibiotics, sedatives, cortisone, thyroid medications, and antacids can affect the coat as well. If these medications are required for your pet to have a high quality of life, then expect that the pet may not have a show-quality coat and may experience hair loss, patchiness, or coat changes.
If your pet is on these medications, be extra careful while grooming to prevent unnecessary damage to the coat.
Diet
Diet can also be a factor for pets experiencing coat loss. This can be caused by iron deficiency, over-intake of vitamin A, sudden dietary changes, or a lack of essential fatty acids.
A dog’s coat is built from the inside out. Poor nutrition, unbalanced diets, inappropriate supplementation, or sudden food changes can show up in the skin and coat long before many owners connect the dots.
Genetic Coat Loss
Even though this applies to a relatively small percentage of pets with coat loss, it is usually caused by the breed itself, not necessarily by the breeding.
The thicker the coat shaft of the breed, the less likely it is to break. The darker the coat, the stronger the hair tends to be, with straight black and red being among the strongest while white coats are more brittle.
Curl and texture play a factor too, with curly hair being more susceptible to breakage or splitting than straight hair. The curlier the hair, the more easily it can be damaged.
How to Control Dog Shedding at Home
Heavy shedding is not always a crisis. In many dogs, it is a maintenance problem that can be controlled with consistency.
Brush Outside Once a Week
For many heavy-shedding dogs, a good brushing outdoors once a week can keep the shedding under control and keep your house free of excessive hair. During seasonal coat blowouts, you may need to brush more often.
Use the Right Tool for the Coat
A slicker brush, undercoat rake, curry brush, grooming glove, pin brush, comb, or de-shedding tool may all have a place, but the right tool depends on coat type. The wrong tool can damage the coat or irritate the skin.
Do Not Over-Bathe
Bathing can help remove loose coat, dirt, and odor, but excessive bathing, harsh shampoo, or aggressive scrubbing can dry the skin and damage the coat. Use dog-safe products and rinse thoroughly.
Dry and Brush Correctly
Brushing while drying with a pet-safe dryer can help loosen dead undercoat and remove hair before it lands all over your home. Avoid excessive heat from human hair dryers.
Watch Diet and Skin Condition
A dull, brittle, dry, flaky, or excessively shedding coat may reflect nutrition, allergies, parasites, infection, or another issue. Coat care is not only external.
Use Professional Help When Needed
A professional de-shedding treatment can remove a significant amount of loose undercoat, reduce hair in the home, and help identify skin, ear, paw, nail, or coat problems early.
When Shedding May Be a Health Problem
Normal shedding does not usually create painful skin, open sores, bald patches, strong odor, or obvious distress.
Common Questions About Dog Shedding
Quick answers for pet owners trying to figure out what is normal, what is manageable, and what needs help.
Do all dogs shed?
Yes. Every dog sheds to some extent because hair has a growth cycle. The difference is how much hair is released, how quickly the coat grows, whether the coat mats easily, and how much grooming is required to keep the coat healthy.
Are light-shedding dogs easier?
Not always. Many light-shedding dogs require professional grooming, haircuts, brushing, and mat prevention. They may leave less hair on the couch but cost more in grooming over the dog’s lifetime.
Why does my indoor dog shed all year?
Indoor dogs are exposed to artificial lighting, air conditioning, central heat, and temperature patterns that do not match natural outdoor seasons. That can disrupt the normal seasonal coat cycle and create year-round shedding.
Is shedding the same as hair loss?
No. Shedding is normal coat turnover. Hair loss is more concerning when it involves bald patches, broken hair, skin irritation, itching, sores, redness, infection, parasites, hormonal disease, nutrition problems, or sudden coat changes.
Need Help Controlling Shedding?
PAWS grooming services can help with coat maintenance, Shed-Less treatments, bathing, brushing, nail care, ear care, and practical grooming plans for dogs that shed heavily or mat easily.
Shed-Less Treatments
Help remove loose undercoat, reduce shedding in the home, and keep heavy-shedding dogs more comfortable.
Explore Grooming ServicesDog Grooming Basics
Learn the fundamentals of eyes, ears, teeth, nails, feet, coat care, bathing, drying, and grooming safety.
Read Grooming BasicsMore Grooming Advice
Continue learning about nails, ears, choosing a groomer, muzzle training, coat care, and professional grooming.
Visit Grooming Advice“A dog that sheds heavily is not necessarily a high-maintenance dog. A dog that sheds lightly is not necessarily a low-maintenance dog. Coat type decides the work.”
— PAWS Dog GroomingControl the Coat Before the Coat Controls the House
Whether your dog sheds heavily, mats easily, blows coat seasonally, or has coat loss that does not look normal, PAWS can help you understand the difference and choose the right grooming approach.