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.

Anemia in Cats: Signs, Causes & Prevention (Vet Answer)

sick cat lying on the floor

Anemia is an insidious disease that can affect your cat. Unfortunately, veterinarians often diagnose anemia when it has progressed to being a significant condition, causing weakness and lethargy. The signs are often subtle, so what do you look for to diagnose anemia in cats? Read on to learn more about the process.

divider 3 paws

What Is Anemia?

Anemia is when there is not a healthy amount of red blood cells circulating around the body. This health issue can also be due to a reduced amount of hemoglobin in the body.

Red blood cells transport oxygen from the lungs throughout the body. Without adequate levels of red blood cells, your cat will become weak as they can’t get enough oxygen to all the areas of the body.

Red blood cells form within the bone marrow. They circulate for roughly two to three months unless they become damaged. In a healthy pet, the old red blood cells get replaced by new red blood cells in a continuous cycle.

Without the healthy amount of red blood cells circulating around the body, the organs do not receive enough oxygen, and this can lead to them failing. Severe anemia can be fatal.

Sick sad cat lying on the bed
Image Credit: Zhuravlev Andrey, Shutterstock

Signs of Anemia in Cats

Oxygen is necessary for many of the cellular reactions that occur within your cat’s body. An anemic cat is typically tired or lethargic. Unfortunately, lethargy is a relatively nonspecific finding, and in older cats, you might attribute it to their age.

Here are some other signs to be aware of:

  • Pale gums
  • Looking jaundiced or yellow
  • Higher-than-average respiratory rate or heart rate (tachypnea and tachycardia)
  • Trouble breathing
  • Black, tarry stools or even actual blood (hematochezia)
  • Diarrhea
  • Blood in their urine
  • A fever and feel warmer than usual to the touch

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

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!

PangoVet_Mention-in-Content for PangoVet2 save money

Causes of Anemia in Cats

Your veterinarian can classify the causes of anemia into one of the major categories. These are as follows:

  • Red blood cell destruction
  • Red blood cell loss
  • Trouble producing red blood cells

1. Red Blood Cell Destruction

If your cat eats certain toxic things, these substances could trigger your cat’s body to destroy red blood cells. Tylenol, garlic, and zinc are just a few materials that can cause erythrocyte oxidative injuries. The spleen helps clean up these damaged red blood cells, taking them out of circulation.

Infectious diseases can also contribute to red blood cell destruction. Often, fleas and ticks transmit these organisms, which is just one of the reasons why you should keep your cat on flea and tick prevention. Some of these infectious agents include:

  • Mycoplasma haemofelis
  • Cytauxzoon felis
  • Babesia

In some cases of feline anemia, cats have immune-mediated hemolytic anemia. While some cases are idiopathic, and we don’t know the cause, vaccines or viruses such as feline leukemia may trigger some cases. With this condition, the immune system destroys the cat’s red blood cells.

sick and skinny cat sitting on the pavement
Image Credit: turbaliska, Shutterstock

2. Red Blood Cell Loss

Your cat can lose red blood cells in a range of ways. Unfortunately, parasites are a common cause of anemia. Your cat could have fleas or ticks that feed on blood, and these parasites can transmit infections that contribute to anemia.

Injuries can cause anemia. Outdoor cats are in danger of being hit by a car, but even cats that hang out on the balcony can fall from a height.

Some cancers can contribute to blood loss, such as transitional cell carcinoma in the bladder. Abnormalities in the gut, like ulcers, can also be associated with blood loss.


3. Trouble Producing Red Blood Cells

One of the significant conditions affecting senior cats is chronic kidney disease or renal failure. When the kidneys stop functioning normally, a hormone known as erythropoietin isn’t produced in appropriate amounts. This chemical messenger tells the bone marrow to produce more red blood cells; you’ll have an anemic cat without it.

Anemia of chronic disease is another process where chronic health issues and inflammation cause your cat’s bone marrow to produce fewer red blood cells.

russian blue cat receiving blood transfusion
Image Credit: Todorean Gabriel, Shutterstock

divider cat paw scratch oct 2024

Frequently Asked Questions (FAQs)

How can I prevent anemia in cats?

Reducing possible exposure to agents that can cause anemia is essential for preventing anemia in cats. Keeping your cat inside is the best way to accomplish this feat. It’ll minimize their possible exposure to fleas and ticks, decrease their chances of getting exposed to viruses like feline leukemia, and virtually eliminate the possibility of getting hit by a car.

Regular preventative care, including screening blood work, can help your veterinarian diagnose potential causes of anemia sooner rather than waiting until your cat is already affected by a low red blood cell count and weak. Earlier intervention with kidney failure could buy your kitty more time.

Preventative care is also crucial for reducing your cat’s exposure to internal and external parasites like hookworms and fleas.

Can a cat recover from anemia?

Cats can recover from anemia sometimes, but not all the time. The prognosis and recovery time depend on many factors, from what is causing the anemia to how healthy your cat is overall. A mild case of flea anemia could be treated using flea prevention and environmental control measures, while an autoimmune condition may have a rather poor prognosis for recovery.

What do vets give cats for anemia?

The treatment your veterinarian prescribes for your anemic cat will depend on what the underlying cause of the anemia is and how severe it is. A blood transfusion may be necessary for a cat with a target low packed cell volume, but a mild case might be treatable with a vitamin supplement that contains iron, such as Pet-Tinic.

divider 3 paws

Conclusion

If your cat has anemia, you’re probably wondering what you need to do and if there’s any way you could have prevented it. Your veterinarian will need to run some diagnostic tests, but they can help determine your cat’s prognosis and a treatment plan.


Featured Image Credit: Oporty786, 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

2 Responses

  1. I am driving myself crazy. my cat started out with a jawbreaker candy size tumor, which quickly grew to almost pear size. vet said she's too anemic to get a biopsy. my cat is only 8 years old and I have no answers but I spent a lot of money to find out nothing. ????

    1. Hi Karla, so sorry to hear about your cat. If you have any questions regarding the tests or better understanding and guiding you through your vet's approach please feel free to contact www.pangovet.com they can help guide you with honest information.

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

Walk Your Pet Month 2026: How & When Is It Celebrated?

Many people do not walk their felines. However, they are missing out on a fun and easy way to exercise their cat and...

Why Is My Cat Hissing at Me All of a Sudden? 4 Vet-Reviewed Reasons

A cat usually hisses when they feel uncomfortable or threatened by something in their environment, either another cat, another animal, or even a...

Can Fleas Kill a Cat? Vet-Approved Facts & Safety Guide

Fleas are an annoying part of cat ownership. Unfortunately, your cat will likely get at least one flea infestation at some point during...

Cornish Rex Price: What They Cost in 2026

The Cornish Rex is a domestic breed of cat that has unusual fur. Instead of an outer coat, a middle layer, and an...

More related

Is Your Cat Vomiting? Try These Gentle Vet-Approved Diet Fixes

Watching your cat throw up is scary, and the wrong food can make things worse. When your feline friend’s stomach is upset, choosing...

Can Cats Eat Spaghetti? Vet Reviewed Facts To Know!

It’s totally normal for loving pet owners to want to share their favorite foods with their feline companions. In many cases, this is...

My Cat Thinks I’m Weird: Ivy’s Take on Human Habits

Welcome to the Wednesday Cats of Catster! Every week, we share a story from one of our cat-loving Catsters. This week is about...

Persian Kittens for Sale in Canada: 2026 Breeders List

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

Keep reading

How Do Cats Drink Water? Vet-Approved Facts

Have you ever watched a cat drink water before? It’s not something many people think too much about, but it’s truly an amazing feat of physics that requires perfect timing and balancing inertia with gravity. Sounds unbelievable? Keep reading to...

cat drinking from cat water fountain

Signs a Cat is Dying: 11 Vet-Verified Changes to Look For

It’s the moment that no cat owner wants to contemplate, but as our feline friends get older or maybe develop an illness, their deteriorating health can begin to show signs your cat is dying. As difficult as this time can...

tired or sick cat

Can Cats Eat Hummus? Vet-Reviewed Nutrition and Safety Facts

Hummus is a popular Middle Eastern food enjoyed by many Americans. You can enjoy hummus as a dip, dish, or spread, and if you enjoy eating it in your home, you probably wonder if your cat would like it as...

Can Cats Eat Hummus

10 Best Cat Foods for Constipation in Canada in 2026: Reviews & Top Picks

The worst-case scenario for any cat owner is seeing your pet in distress when they’re trying to pass stool. Constipation can be painful and even eventually turn into a serious problem that will need vet intervention. It can be caused...

Siamese cat eating dry food from a bowl

Wellness vs Blue Buffalo Cat Food: Our 2026 In-Depth Comparison

If you’ve spent time wandering around your pet food store, you might’ve noticed two brands that are a bit higher-end than normal: Wellness and Blue Buffalo. Each of these brands was started fairly recently, and both have cashed in on...

Wellness VS Blue Buffalo

Are Lightning Bugs Poisonous to Cats? Vet-Reviewed Facts & FAQ

Lightning bugs, or fireflies (family Lampyridae), can be fun to watch and relatively easy to find on a summer evening. Your cat also might like chasing them around. However, if your cat ate one when you weren’t looking, you might...

Lightning Bugs

What Is Cat Mirroring? Vet-Reviewed Facts & Why They Do It

Cat mirroring refers to when cats do things in a similar way as humans or other animals in their environment. However, it can sometimes be misinterpreted as a way of cats being able to copy certain behaviors consciously, while it...

bengal cat gives a high-five paw to the owner

9 Best Dematting Tools for Cats in 2026 – Reviews & Top Picks

Keeping your feline healthy and happy is your top priority, but are you brushing your cat’s hair every week? Cat owners often disregard grooming duties because cats seem to take care of themselves pretty well. Cats are methodical about cleaning...

hand holding shedded cat hair

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.