A little pet hair on the couch is practically part of the decorating scheme when you share your home with dogs or cats. But if your furry friend suddenly develops bald patches, thinning fur, or nonstop scratching, it is understandable to feel concerned. At Olympia Veterinary Hospital, your Tumwater, WA veterinary clinic, pet owners frequently ask about pet hair loss and what might be causing it. While some shedding is completely normal, unusual fur loss can sometimes indicate underlying health problems that warrant veterinary attention.

Hair loss in pets can occur for many reasons, including allergies, skin infections, stress, and hormonal conditions. Some pets lose fur gradually, while others develop noticeable bald spots almost overnight. Understanding why dogs lose fur, what causes cat bald spots, and how pet skin infections affect the coat can help you recognize when it may be time to schedule a veterinary exam. Knowing the difference between normal shedding and excessive shedding in pets is an important part of protecting your furry pal’s health and comfort.

What Is Normal Shedding?

Most dogs and cats shed at least a little bit all year long. Shedding is just part of the natural hair cycle—out with the old, in with the new! It’s your pet’s way of keeping their coat in tip-top shape.

Some pets really kick their shedding into high gear during spring and fall, when the weather changes. If you have a double-coated breed, you might feel like you’re living in a snow globe made of fur during these times!

Normal shedding usually:

• Occurs evenly across the body
• Does not create bald spots
• Does not cause itching or redness
• Leaves the skin looking healthy

Even healthy cats somehow manage to leave fur on every black article of clothing within a three-mile radius.

When Pet Hair Loss Becomes a Concern

It’s time to pay closer attention if your pet’s fur loss seems excessive, patchy, or comes along with other symptoms.

Warning signs include:

• Bald patches
• Red skin
• Constant scratching
• Scabs
• Skin odor
• Excessive licking
• Ear infections
• Skin thickening

If your furry pal seems itchy, uncomfortable, or if you spot any irritated skin, it’s a good idea to let your vet take a look.

Remember, hair loss is usually a symptom, not the main problem. Figuring out what’s causing it is the key to helping your pet feel better.

Why Dogs Lose Fur

There are lots of reasons why dogs might lose fur. Sometimes it’s a minor, temporary issue, but other times it means your pup needs a little extra help from the vet.

Common causes include:

• Allergies
• Fleas
• Skin infections
• Hormonal disorders
• Stress
• Parasites
• Nutritional problems

Dogs often react to skin irritation by repeatedly scratching, chewing, or licking the affected areas. Unfortunately, this behavior can worsen inflammation and lead to additional fur loss.

You might even catch your dog doing the classic wiggle against the carpet or furniture, all in an effort to scratch that itch.

Cat Bald Spots Causes

Cats can develop bald spots for a variety of reasons, too. Often, it’s because they’re overgrooming—sometimes due to itchiness, stress, or just plain feline fussiness.

Cats experiencing hair loss may:

• Groom excessively
• Develop symmetrical bald areas
• Hide more often
• Become restless
• Develop scabs or skin irritation

Some cats are so sneaky about overgrooming that you never actually catch them in the act. One day, you just notice a thin patch or a little bald spot and wonder if you’re imagining things.

Of course, your feline overlord will act like nothing is out of the ordinary—even when the evidence says otherwise.

Allergies and Itchy Skin

Allergies are one of the most common causes of pet hair loss in both dogs and cats. Allergic inflammation often causes intense itching, which leads to scratching, licking, and chewing.

Common allergy triggers include:

• Pollen
• Dust mites
• Fleas
• Mold
• Food ingredients

Pets with allergies frequently develop:

• Red skin
• Ear infections
• Paw licking
• Hair thinning
• Scabs

Some pets only get itchy during certain seasons, while others seem to have the itchies all year long.

Fleas Can Cause Major Hair Loss

Even a small number of fleas can create significant irritation for sensitive pets. Flea allergy dermatitis is especially common in dogs and cats prone to allergic reactions.

Pets with flea allergies may develop:

• Bald spots near the tail
• Red irritated skin
• Intense itching
• Scabbing

Fleas are masters of hide-and-seek, so you might not spot them right away—even if your pet is scratching up a storm.

Keeping up with regular flea prevention is one of the best ways to keep your pet comfortable and their coat looking its best.

Pet Skin Infections

Pet skin infections often develop secondary to allergies, moisture, parasites, or self-trauma from scratching.

Bacterial and yeast infections may cause:

• Hair loss
• Odor
• Redness
• Crusting
• Greasy skin
• Itching

Dogs with skin infections can sometimes develop hot spots—those red, moist, and painful patches that seem to pop up overnight and make everyone miserable.

Cats, on the other hand, might get little scabby spots, especially around their head and neck.

Stress and Anxiety Can Affect Fur Loss

Stress can definitely play a role in fur loss—especially for our feline friends, who are experts at dramatic reactions.

Environmental stressors may include:

• Moving
• New pets
• Household changes
• Loud noises
• Schedule disruptions

Some pets respond to stress by overgrooming excessively, leading to thinning fur or bald patches.

Cats are especially sensitive to changes in their environment. Sometimes, just moving a chair or switching laundry detergent is enough to send your kitty into a full-blown drama.

Hormonal Conditions and Hair Loss

Hormonal imbalances can affect coat quality and fur growth in both dogs and cats.

Conditions that may contribute to hair loss include:

• Thyroid disease
• Cushing’s disease
• Hormonal imbalances

Hormone-related hair loss often develops gradually and may occur symmetrically along the body.

Unlike allergies, hormonal issues often cause fur thinning without making your pet super itchy.

Excessive Shedding in Pets

Excessive shedding in pets does not always involve bald spots. Some pets simply lose much more hair than usual due to stress, illness, poor nutrition, or skin disease.

Excessive shedding may occur alongside:

• Dry skin
• Dull coat
• Weight changes
• Low energy
• Digestive problems

What your pet eats matters, too! A balanced diet helps keep their skin healthy and their coat shiny.

Ringworm and Contagious Skin Conditions

Despite its name, ringworm is a fungal infection, not a worm.

Ringworm may cause:

• Circular bald spots
• Scaly skin
• Broken hairs
• Mild itching

Ringworm can spread to people and other pets, so it’s important to get a proper diagnosis and treatment from your vet.

Kittens, puppies, and pets with weaker immune systems are especially at risk.

How Veterinarians Diagnose Hair Loss

When you bring your pet in for hair loss, your vet will usually start with a good look at your furry friend and a chat about their symptoms and daily routine.

Your veterinarian may evaluate:

• Skin condition
• Parasite exposure
• Diet history
• Seasonal patterns
• Grooming behavior
• Environmental factors

Depending on findings, diagnostic testing may include:

• Skin scrapings
• Cytology
• Bloodwork
• Allergy testing
• Fungal cultures

The goal is to figure out what’s really causing the hair loss, so we can treat the problem—not just cover up the symptoms.

Treatment Depends on the Cause

Treating hair loss depends on what’s causing it in the first place.

Treatment may involve:

• Allergy management
• Flea prevention
• Medicated shampoos
• Antibiotics
• Antifungal medications
• Diet changes
• Stress reduction

Some pets bounce back quickly once we tackle the root cause, while others may need a bit more ongoing care.

Your vet can help create a treatment plan that’s just right for your furry pal.

Supporting Healthy Skin and Coat at Home

Healthy skin and a shiny coat start with good overall care.

Helpful habits may include:

• Regular grooming
• Flea prevention
• Balanced nutrition
• Routine veterinary exams
• Monitoring skin changes early

Regular brushing helps reduce loose fur, keeps your pet’s coat looking great, and gives you a chance to spot any changes early.

WebMD has some helpful information about brushing cats. Spruce Pets has a helpful article about dog coat types and grooming needs.  

FAQ About Pet Hair Loss

Why is my dog losing fur?

Why dogs lose fur depends on the underlying cause, which may include allergies, fleas, skin infections, hormonal conditions, or stress.

What causes bald spots in cats?

Causes of cat bald spots may include allergies, overgrooming, infections, stress, parasites, or hormonal disease.

Is excessive shedding in pets normal?

Some seasonal shedding is normal, but sudden or extreme shedding may signal an underlying medical issue.

Can skin infections cause hair loss?

Yes. Pet skin infections commonly cause itching, inflammation, odor, redness, and fur loss.

Schedule a Skin and Coat Exam at Our Tumwater, WA Veterinary Clinic

Changes in your pet’s coat can reveal important clues about overall health. Whether your furry friend is scratching constantly, developing bald patches, or experiencing excessive shedding, early veterinary care may help identify the cause before discomfort worsens.

If you are searching online for a “vet near me,” Olympia Veterinary Hospital is here to help. Our Tumwater, WA animal hospital provides compassionate care for dogs and cats, including wellness exams, allergy evaluations, skin care, and treatment for pet hair loss and skin infections. Contact Olympia Veterinary Hospital today to schedule an appointment for your furry pal.

This blog is intended for informational purposes only. Always consult your veterinarian for medical advice, diagnosis, and treatment recommendations for your pet and follow their professional guidance.

Do you want to learn more about our pet clinic in Olympia, WA? Our Service Page is a great start. You’ll find a great overview of our animal hospital and the services we offer, which range from basics like Wellness and vaccinations, Dentistry, and Weight management, to more specialized offerings like Internal Medicine. Call us anytime to learn more!