Get

In Your Inbox

Catster is reader-supported. When you buy via links on our site, we may earn an affiliate commission at no cost to you. Learn more.

Why Is My Cat Shedding All of a Sudden? 8 Vet-Reviewed Reasons

Share

Persian cat and a pile of shedded cat hair

When it seems like your cat’s fur is coming out in clumps or you’re finding little fluffy tumbleweeds everywhere all of a sudden, it can be worrisome. In most cases, shedding is just part of being a cat. It’s a natural process—especially when the weather starts to get warmer—that helps them get rid of dead hair and grow new, healthy hair in its place.

That said, in some cases, shedding is caused by something abnormal, like a medical condition, poor diet, or stress. A check-up at the vet is advised if the shedding is combined with other signs. In this post, we’ll explore eight possible reasons why your cat may be shedding like crazy all of a sudden.

divider cat faces 2 oct 2024

The 8 Possible Reasons Your Cat Is Shedding All of a Sudden

1. It’s Shedding Season

Cats typically shed in spring and fall, and though it may seem like they’re losing a huge amount of fur, seasonal shedding is nothing to be concerned about. Shedding takes place in spring to thin out the winter coat and prepare your cat for the hot summer weather. Fall shedding helps get your cat ready to grow a new, thick winter coat.

You can give your cat (and your overworked vacuum) a helping hand in shedding season by brushing them regularly to loosen dead hairs and get rid of them faster.


2. You’ve Got a Heavy-Shedding Breed

Though all cats shed to some extent, some breeds are heavier shedders. Ragdolls, Maine Coons, and American Bobtails make up a few of the heaviest-shedding cat breeds. Therefore, it’s not uncommon for these types of cats to shed even larger clumps of hair than other breeds.

hand holding shedded cat hair
Image Credit: Doucefleur, Shutterstock

3. Your Cat Is Stressed Out

Stress and anxiety can cause your cat to shed more than usual. In addition, stressed and anxious cats sometimes over groom as a way to soothe themselves, so if your cat is losing more hair than usual or you spot bald patches, this might be the cause.

Other signs of anxiety to watch out for are generally poor coat condition, odd bathroom habits like urinating outside the box, diarrhea, vomiting, hiding, or asking for more attention.

If you need to speak with a vet but can't get to one, head over to PangoVet. It's an online service where you can talk to a vet online and get the advice you need for your pet — all at an affordable price!

Preventative wellness PGV mention keep cat healthy Preventative wellness PGV mention keep cat healthy mobile

4. Your Cat Has Allergies

white cat shedding
Image Credit: DreamBig, Shutterstock

Skin allergies are another reason why your cat might be shedding all of a sudden. Discomfort, itchiness, hair loss, scabbing, and sores are other giveaway signs of an allergic skin disease. Skin allergies can be caused by several things, including irritants inside or outside of the house, reacting badly to a certain type of food, and being allergic to or getting bitten by fleas.


5. Your Cat Is a Senior

Older cats can be a little more lax than they used to be when it comes to grooming themselves. In most cases, it’s because it’s more difficult for them to do so. This can result in a build-up of dead fur and matting if they’re not brushed regularly. Get your vet to give them a check-over in case there are signs of arthritis or dental problems.


6. Your Cat Has a Medical Condition

Certain medical conditions like hyperthyroidism and parasites can cause cats to lose a lot more hair than usual. Alopecia can be caused by a variety of factors, including overgrooming due to stress and skin conditions. Specific skin conditions that may exacerbate hair loss are scabies, ringworm, and feline eosinophilic granuloma complex.

There are a lot of medical conditions that have the potential to cause excessive hair loss, so always check with your vet if you suspect a health issue is at play.


7. Your Cat’s Diet Is Poor

American shorthair cat eating
Image Credit: Apicha Bas, Shutterstock

Poor nutrition is also a cause of excessive hair loss in cats. If your cat doesn’t eat a quality balanced and complete diet with all the nutrients they need to stay healthy, it can affect their coat and skin condition drastically. Certain nutritional deficiencies, such as zinc deficiency, can also cause hair loss.


8. Kittens Are on the Way

It’s not uncommon for pregnant cats to shed more due to hormone changes. This can also happen when they’re nursing or just after they’ve given birth. We recommend having a chat with your vet to find out how you can make sure your pregnant cat is eating the right foods to support healthy skin and coat.

divider cat paws oct 2024

Final Thoughts

To sum up, shedding is a natural occurrence in every cat, but some cats shed more than others for various reasons. Sometimes, it is down to their breed and having an undercoat to shed, whereas in other cases, a health condition, like allergies, alopecia, or a skin infection, may be causing hair loss.

If your cat is shedding to the point where it’s starting to worry you or you’ve noticed bald patches or excessive grooming of late, talk to your vet to make sure your cat isn’t suffering from anxiety or another health issue.


Featured Image Credit: DreamBig, Shutterstock

Want content like this delivered to you?

Sign Up For Our Newsletter

News, insights, expert advice, and everything cat

* By submitting, you agree to our Terms & Conditions and Privacy & Cookies Policy.




How useful was this post?

Click on a star to rate (you can leave written feedback after clicking submit)

Help us improve Catster for pet parents!

Your feedback really matters.

What did you like about this post? Also how can we improve it?

Join the conversation

Leave a Reply

You’re very welcome to leave a comment or question. Please know that all comments must meet our community guidelines, and your email address will NOT be published. Let’s have a positive and constructive conversation.


Talk With A Vet Online

Peace of mind,
anywhere, anytime

Affordable vet advice

Ask Dr. Paola – Help! My Male Cat Gets Into Fights! (March 9, 2026)

Welcome to our “Ask Dr. Paola” series, where every Monday we bring expert advice straight from Dr. Paola Cuevas (MVZ) to help our...

Why Your Cat’s Poop Smells Like a Biohazard

Nobody enjoys litter box duty, but sometimes it gets unbearable. The smell hits you from across the room. You’re scooping faster, lighting candles,...

RIP Your Furniture? Not With This Guide to Cat Scratch Damage Control

Your couch looks like it survived a minor apocalypse. The curtains have mysterious vertical shreds. That new rug you splurged on is already...

Celebrating 15 Years as the Most Popular Resident of No. 10 Downing Street

For almost 300 years, a rather unassuming Georgian building of black bricks with a shiny black door has been the official residence and...

More related

How to Find a Cat-Friendly Vet: 5 Vet-Reviewed Steps

If you’ve just moved or recently adopted a cat, and you’re looking for a vet to take them to for their checkups and...

Maine Coon Kittens for Sale in California: Breeders List 2026

Catster advocates for adopting before shopping, though we fully understand there are many reasons for seeking a breeder. So, we encourage it to...

10 Best Designer Cat Furniture Brands of 2026 – Reviews & Guide

You may have spent hours putting careful thought into designing the interior of your home, only to have a mass-produced piece of cat...

PetFusion Ultimate Cat Scratcher Lounge (2026 Review)

When it comes to scratchers, your cat’s individual preference is the determining factor. Some cats are horizontal scratchers, while others prefer vertical scratchers....

Keep reading

Do Cats Need Fresh Air? Improving Your Cat’s Health & Happiness

Have you ever spent a day or two too long indoors and started to go a little stir-crazy? Did you know that your cats can absolutely feel the same way if not provided enough enrichment and physical and mental stimulation?...

cat having fun on a sunny day in the lawn

Can Cats Eat Squash? Vet-Verified Nutrition Facts & FAQ

Squash is a large fleshy fruit, although it’s often mistaken for a vegetable and is usually considered so in recipes and cooking instructions. The most common forms of squash are the zucchini and the pumpkin. We humans typically enjoy the...

Can Cats Eat Squash

Why Do Cats Hate Closed Doors? 6 Vet-Verified Likely Reasons

As any cat owner knows, cats have a lot of quirks and idiosyncrasies. One of them is a hatred for closed doors, no matter what lies behind them. Sometimes, this innate drive to get into the closed room could lead...

cat sitting near the door at home

Is Tea Tree Oil Poisonous to Cats? Vet Reviewed Risks & FAQ

Tea tree oil is often used for its antibacterial and antimicrobial properties but it should never be used on cats. Holistic health practitioners often use a blend of traditional medical therapies as well as food, essential oils, teas, and aromatherapy...

tea tree essential oil

Why Is My Cat Peeing Outside the Litter Box? 7 Possible Vet-Approved Reasons

Cat pee is not a pleasant odor, even when it’s safely contained in a litter box. However, when a cat starts urinating in inappropriate locations, the situation escalates. Inappropriate urination is a common reason that cats are surrendered to animal...

orange cat beside litter box

Snowshoe Cat Vet-Approved Weight, Size & Growth Chart

Snowshoe cats are gaining popularity, and more and more people are becoming interested in the breed, particularly in the United States. But how big do Snowshoe cats get? How fast do they grow? What do they need to maintain a...

cat breed snowshoe

Can Cats Eat Scallops? Vet-Approved Facts & FAQ

Cats eating fish and other seafood is a common trope, but you may be wondering if it’s safe for them to have. Scallops are a common and nutritious meal for people, but what about cats? Can cats eat scallops? Is...

Can Cats Eat Scallops

Do Devon Rex Cats Shed a Lot? Vet-Verified Tips to Reduce Cat Hair & FAQ

The Devon Rex cat, with its pixie-like appearance and charming personality, is an increasingly popular breed of feline. While these cats are known for their curly hair, endearing nature, and playful antics, one of the most common questions prospective owners...

woman brushing calico tortoiseshell Devon Rex

Love Cats? So Do We! Join the Catster Community

Stay informed with expert pet care insights delivered straight to your inbox! Discover professional guidance on animal behavior, feeding tips, trusted product picks, and much more.




Sign up for the Catster Email Newsletter

Stay informed with expert pet care insights delivered straight to your inbox! Discover professional guidance on animal behavior, feeding tips, trusted product picks, and much more.