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.

Swimmer Syndrome in Cats: Our Vet Explains Causes, Signs & Treatments

Share

American shorthair cat kitten sitting

Swimmer syndrome is a developmental abnormality that occurs in newborn kittens. The condition can be observed starting at the age of 15–20 days. This anomaly causes the hind legs (and sometimes the front legs) to move caudally and laterally, like a frog. Cats suffering from this condition look like they are swimming.

The exact cause of this condition is still unknown. Although swimmer syndrome in cats can lead to mobility problems, the disease can be treated if it is addressed in time. So, if you see the clinical signs in your kitten, contact a veterinarian as soon as possible!

In this article, you will learn what swimmer syndrome in cats is, the causes of this condition, the clinical signs, the treatment, and what else you can do for your cat.

divider cat paws 2 oct 2024

What Is Swimmer Syndrome in Cats?

Swimmer syndrome is a developmental abnormality in young, newborn kittens (it becomes obvious when the kitten is 15–20 days of age). It is characterized by a weakness of the hind limbs, which leads to walking and standing difficulties1.

The name of this condition comes from the fact that the affected kitten always sits with their chest on the ground and their back legs stretched sideways. The affected kittens will have a posture similar to that of frogs: The hips will come out to the side of the body, and the legs will also be placed to the side.

These kittens find it difficult to stand and walk. The condition is treatable through early intervention and physical therapy, and it is not necessary to euthanize the affected cats.

Arabian Mau Kitten
Image Credit: Wirestock Creators, Shutterstock

What Are the Signs of Swimmer Syndrome in Cats?

Swimmer syndrome affects only newborn kittens. They are born with this condition; they do not acquire it along the way. The clinical signs are few, but the position of your cat’s legs will tell you everything. The affected kitten will not be able to walk or stand.

If your pet is showing these signs, we suggest you speak to a vet.

What Are the Causes of Swimmer Syndrome in Cats?

The exact causes of this syndrome in cats are not known. However, some vets attribute it to genetic and environmental factors. It is suspected that this condition may be one of the many consequences of inbreeding. Also, an unbalanced diet of the mother can lead to musculoskeletal development problems in kittens. The tendons of the locomotor system can be weakened, which will make the hips flexible and the limbs turn outward. The tendons are weakened, which makes the hips flexible and the limbs turn outward.

Swimmer syndrome can occur in any cat breed.

What Is the Treatment for Swimmer Syndrome in Cats?

The diagnosis of this condition is made only by the visual observation of the affected kittens; there are no specific tests to diagnose swimmer syndrome. The treatment must be started as early as possible for a favorable prognosis.

It was once believed that there was no cure for this condition, and many pets were euthanized unnecessarily. Fortunately, swimmer syndrome can now be treated, and many cats can develop normally without their gait being affected.

The treatment can consist of swimming sessions, other physical therapy exercises, and massage, which will help your cat use their limbs correctly. The vet will also use adhesive plaster bandages or medical tape to wrap the kitten’s legs together. This bandage will keep the affected cat’s limbs in the correct position, providing stability. Also, massaging your cat’s muscles and feeding them a proper diet can help your pet recover faster.

If the affected kitten is left to sit with their chest on the floor for a long period, they can develop a condition called flat-chested kitten syndrome (FCKS), which can be fatal. FCKS can cause skin lesions on the chest, breathing problems, and food regurgitation. Cats can eventually die due to lung collapse. Therefore, it is necessary to consult a vet and treat swimmer syndrome quickly.

cat-massage
Image Credit: Ekaterina Kuzovkova, Shutterstock

How Do I Care for a Cat or Kitten With Swimmer Syndrome?

If you think that your kitten is suffering from swimmer syndrome, here is what you can do to help them:

  • Contact the vet for an evaluation, an accurate diagnosis, and a treatment plan.
  • Your vet will demonstrate how to tape or bandage your kitten’s limbs in the correct position, using the right amount of tension. Do not attempt to do this before seeking veterinary advice, as the incorrect positioning could lead to more problems. If you shape your kitten’s legs regularly in the normal position, their muscles, bones, and ligaments will be trained to stay in the proper configuration, and your kitten will start to have the correct posture and movement.
  • Do physical therapy with your kitten daily (doing a range of motion exercises, cycling, placing their feet under their body when they are eating, swimming, using heat, and/or massaging each leg).
  • Change their diet according to the vet.

divider cat paws 2 oct 2024

Frequently Asked Questions (FAQ)

Can a Cat Live With Swimmer Syndrome?

Swimmer syndrome is a developmental abnormality, and a kitten is born with it. Without treatment, the kitten will end up sitting on their sternum all the time because they cannot walk or stand. It can lead to the development of other conditions that can be fatal, such as flat-chested kitten syndrome. Cats affected by FCKS will eventually die due to lung collapse. For this reason, veterinarians often recommend euthanasia.

Does Swimmer Syndrome Hurt Kittens?

Besides the fact that this syndrome makes it impossible for the affected kitten to stand or move normally, it can lead to severe (even fatal) complications because the affected kitten will sit on their chest all the time.

Why Is My Cat Walking Weird With Their Back Legs?

Incoordination, ataxia, or wobbly walking is a clinical sign that shows that your cat may suffer from a neurological or inner ear condition. Neurological disorders can be primary or secondary to kidney disease, infections, trauma, poisoning with chemicals, drugs, toxins, plants, etc. Therefore, if your cat is walking funny, contact the vet immediately.

divider cat paws 2 oct 2024

Conclusion

Swimmer syndrome in kittens is a congenital condition, which can be observed at the age of 15–20 days. Kittens with swimmer syndrome cannot walk normally or stand because their back legs are in a lateral position, like a frog. Clinical signs include the position of the hind limbs and the fact that the kitten cannot walk or stand. The diagnosis is made only based on the clinical signs; there are no specific tests.

Fortunately, this condition is treatable but early intervention is required. The treatment consists of wrapping the affected kitten’s legs together with medical tape that should be changed once or twice per day. In addition, physical therapy will do wonders. If you think that your kitten is suffering from swimmer syndrome, contact your vet as soon as possible.

Related Reads:


Featured Image Credit: Top Photo Engineerm 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.


Catster's Digital Magazine is Back!

Vet-approved health & behavior advice

Real cat stories & community features

Chatting with Devin About Here! Have a Kitten, Fostering, & Why Two Are Better Than One | Chatty Cattys, Episode 29

In this episode of Catster’s Chatty Cattys podcast, Nicole & Dr. Karyn sit down with Devin, the founder and one-woman show behind “Here...

Decoding The Cat Loaf: What It Means and When to Worry

Few cat behaviors have captured the internet quite like the loaf. Paws tucked neatly beneath the body, tail wrapped in, perfectly rectangular. As...

Your Cat Isn’t Picky – Their Nose Is Just Bored

If you’ve ever sighed while scraping uneaten cat food into the trash, you’re certainly not alone. Many cat owners know the routine: their...

Ask Dr. Paola – Help! My Kitten Won’t Use the Litter Box! (July 27, 2026)

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

More related

Scaredy Cats vs Curious Kitties: How the Wednesday Cats of Catster React to Strangers

Welcome to the Wednesday Cats of Catster! Every month, we ask our cat-loving Catsters to weigh in on a new topic. This week,...

Do Antibiotics Make Cats Sleepy? Vet-Reviewed Side Effects of Antibiotics

Antibiotics are one of the most effective ways to fight infections and have been used for more than 50 years by veterinarians. While...

How Often Should I Change Cat Litter? 5 Things to Consider (Vet-Reviewed)

Cats are fastidious animals that greatly appreciate fresh, clean litter. If the litter isn’t up to their standards, they may just do their...

8 Best Outdoor Cat Repellents in 2026 – Reviews & Top Picks

As you probably know, cats follow a particular set of rules that often conflict with human interests. Instead of taking a nap on...

Keep reading

What Is the Difference Between Cat & Human CBD Oil? Vet-Verified Facts & Safety Guide

With increasing reports and testimonials, CBD is often discussed for potential use in anxiety, nausea, depression, pain, and more. With significantly more research available on human CBD, you may be wondering what the differences between CBD for humans and CBD...

maine-coon-cat-lying-near-CBD-oil

Why Is My Cat Licking the Carpet? 5 Vet-Reviewed Reasons

If you have a cat, you’ll already know how quirky and unpredictable they can be. Unfortunately, when our cats have something going on, they can’t tell us. It’s up to us to work it out, and it can be challenging,...

cat licking carpet_cottonbro-studio_pexels

16 Common Household Items Cats Like to Play With

Are you tired of spending money on toys your cat doesn’t like? Maybe your cat likes it for a few days but loses interest after a while. What if you stopped buying cat toys and instead started using items you...

cute ginger cat sitting in a paper bag and looking curious sideways

Can Cats Eat Lychee? Vet-Reviewed Nutritional Facts & FAQ

Cats are obligate carnivores, so they need little more than animal protein to stay happy and healthy throughout their lives. However, this is not to say that eating some safe plant material is detrimental to cats. Cats can indeed consume...

Can Cats Eat Lychee

Do Male Cats Spray? Vet-Reviewed Facts & FAQ

Owning a cat will bring their owner so much joy, but unfortunately, it’s not all sweet purrs and cuddles. Some behaviors go hand in hand with owning a cat and are not as pleasant as the positive ones. Spraying is,...

tabby cat spraying outdoors to mark territory

How Do I Choose the Right Toys for My Cat? Vet-Approved Tips & Guide

When you have a cat, you already know how important it is to make sure they have something to do. This is particularly true of purely indoor cats. Cats have a natural instinct to stalk and hunt prey, so without...

Young happy woman choosing toys for pets in pet shop

Dr. Elsey’s Cat Food Clean Protein Review 2026: Recalls, Pros & Cons

Review Summary In 1987, Dr. Elsey and his wife Kathy founded the Dr. Elsey company. The entire idea was to extend help to people and pets in need. Since bad bathroom behaviors are a prime reason cats wind up in...

Dr Elsey's Cat Food Review

What’s the Price of Spaying or Neutering a Cat in the UK (2026 Costs)

Getting your cat spayed (female) or neutered (male) is a common and important consideration when you’re a new cat parent. The price of spaying and neutering varies on your cat’s sex—the procedure is more expensive for female cats—and your location....

two cats lying on a pillow

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.