Understanding Autoimmune Disease in Dogs
Symptoms, types, treatments, and what to do next.
An autoimmune disease happens when the immune system turns on the body itself, mistaking healthy cells for threats. This can affect almost any part of the body, from the blood and skin to the joints and organs, and what that looks like day to day depends a lot on which condition your dog has.
If your dog has just been diagnosed with an autoimmune disease, it’s okay to feel overwhelmed. These conditions can sound frightening, and the information out there isn’t always easy to parse. But here’s what’s important to know upfront: many autoimmune diseases in dogs are manageable, and with the right care and monitoring, your dog can still live a good life.
TL;DR
- Autoimmune diseases happen when the immune system attacks your dog’s body instead of protecting it.
- Symptoms vary by condition, but common signs include pale gums, unexplained bruising, crusty skin, joint swelling, and lethargy.
- The most common autoimmune diseases in dogs are IMHA, ITP, and pemphigus foliaceus.
- Treatment usually means long-term medication and regular vet monitoring, but many dogs do really well with the right care.
- If your dog first shows signs or symptoms after your Lemonade Pet policy is active, diagnostics and treatment for autoimmune conditions may be covered.
What are the common types of autoimmune diseases in dogs?
Autoimmune diseases aren’t one-size-fits-all. Understanding which condition your dog has makes a real difference in knowing what to expect, what to watch for, and what treatment looks like. Here’s a breakdown of some of the most common types.
Immune-mediated hemolytic anemia (IMHA)
IMHA is a common autoimmune disease in dogs. It happens when the immune system starts destroying the body’s own red blood cells. Red blood cells carry oxygen around the body, so when there aren’t enough of them, your dog’s organs and tissues start to struggle.
What to look for: Pale or yellowish gums, weakness, rapid breathing, or in serious cases, collapse. These are signs that something is very wrong and your dog needs to see a vet immediately.
How it’s diagnosed: Your vet will run blood tests to check red blood cell levels. They may also use a Coombs’ test, a specific blood test that checks whether the immune system is attacking red blood cells directly.
How it’s treated: Most dogs with IMHA need to be hospitalized, at least at first. Treatment can include blood transfusions to replace lost red blood cells, along with medication to suppress the immune system and prevent blood clots. IMHA can’t be cured, but with the right treatment and careful monitoring, many dogs manage well long-term.
Immune-mediated thrombocytopenia (ITP)
ITP happens when the immune system destroys platelets. Platelets are the tiny cells that help blood clot when there’s a cut or injury, so when there aren’t enough of them, even minor bumps can cause serious bleeding.
What to look for: Unexplained bruising, small red spots on the skin (which are tiny burst blood vessels), or bleeding from the nose, mouth, or other areas that seems out of proportion to any injury.
How it’s diagnosed: A blood test showing a very low platelet count is usually the first indicator. Your vet may also run additional tests to rule out other causes, like tick-borne disease or bone marrow problems.
How it’s treated: Medication to suppress the immune system is the main approach. Most dogs respond well, though relapses can happen, so regular checkups and bloodwork are important for keeping things on track.
Pemphigus foliaceus
Pemphigus foliaceus is the most common autoimmune skin disease in dogs. It happens when the immune system attacks the proteins that hold skin cells together, causing the skin to blister, crust over, and become infected.
What to look for: Crusty sores or scabs around the nose, eyes, ears, and footpads. In some dogs, the footpads become so thickened and sore that walking becomes painful.
How it’s diagnosed: The only way to confirm pemphigus foliaceus is through a skin biopsy, where your vet takes a tiny sample of affected skin and sends it to a lab for analysis. Breeds more commonly affected include the Chow Chow, Akita, Cocker Spaniel, Labrador Retriever, and Dachshund.
How it’s treated: Medication to calm the immune system is the core treatment. Sun exposure can trigger flare-ups, so keeping your dog out of direct sunlight, especially at midday, is an important part of daily management. Many dogs need lifelong treatment, but symptoms can be well controlled.
Systemic lupus erythematosus (SLE)
SLE is a rare but serious condition where the immune system attacks multiple parts of the body at once. It can affect the skin, joints, kidneys, and other organs, which makes it tricky to diagnose because its symptoms can look like so many other diseases.
What to look for: Skin lesions are often the first sign, but you might also notice joint pain, fever, changes in drinking and urination (which can signal kidney involvement), or general unwellness that comes and goes.
How it’s diagnosed: There’s no single test for SLE. Your vet will build a picture using blood tests, urine tests, skin samples, and imaging like X-rays or ultrasounds to understand which parts of the body are affected.
How it’s treated: Medication to suppress the immune system is the primary approach, and many dogs need a combination of drugs. Because SLE can affect different organs over time, close and ongoing monitoring is really important.
Discoid lupus erythematosus (DLE)
DLE is a milder form of lupus that stays mostly on the surface, affecting the skin on the nose and face rather than internal organs. It’s much more manageable than SLE.
What to look for: Fading of the normal dark pigment on the nose, followed by redness, flaking, and sometimes open sores. In some dogs it can spread to the lips, ears, and around the eyes.
How it’s diagnosed: A skin biopsy is needed to confirm DLE. It’s more common in German Shepherd dogs, Siberian Huskies, Collies, and Shetland Sheepdogs.
How it’s treated: Limiting sun exposure is one of the most important things you can do, since UV light can make DLE significantly worse. Walking your dog early in the morning or in the evening helps. Depending on severity, your vet may prescribe topical creams or oral medication.
Immune-mediated polyarthritis
In this condition, the immune system causes inflammation inside the joints, leading to pain and stiffness across multiple joints at once. It’s different from regular arthritis in that it’s driven by the immune system rather than everyday wear and tear.
What to look for: Limping, stiffness when getting up, swollen joints, or a general reluctance to move around. Some dogs also run a fever. You might just notice your dog seems uncomfortable or less like themselves.
How it’s diagnosed: Your vet will draw a small sample of fluid from an affected joint to check for signs of immune-driven inflammation. X-rays are also used to rule out other causes of joint pain like injury or infection.
How it’s treated: Immune-suppressing medication is typically prescribed. Many dogs improve significantly with treatment, though flare-ups can happen and regular checkups help catch them early.
Autoimmune thyroiditis
Autoimmune thyroiditis is the most common cause of an underactive thyroid in dogs. The immune system gradually damages the thyroid gland over time, and because the thyroid controls metabolism, the effects show up slowly across the whole body.
What to look for: Weight gain without a change in diet, low energy, feeling the cold more than usual, and coat changes like hair loss, dullness, or a dry, flaky texture.
How it’s diagnosed: Blood tests that measure thyroid hormone levels are the first step. More specific tests can confirm whether the cause is autoimmune.
How it’s treated: Daily thyroid hormone replacement medication is the standard treatment, and most dogs respond really well. With consistent treatment, many dogs return to a completely normal quality of life.
What causes autoimmune disease in dogs?
The honest answer is that we don’t fully know. Genetics almost certainly play a role, since some breeds are diagnosed far more often than others. Environmental factors like allergens, pollutants, UV exposure, and certain medications are also thought to trigger these conditions in dogs that are already predisposed.
Breeds more commonly affected include Cocker Spaniels, Poodles, German Shepherds, Beagles, and Shetland Sheepdogs. But autoimmune diseases can affect any dog, regardless of breed or age.
Because triggers aren’t always identifiable, and symptoms can build gradually over months, the best thing you can do is get your dog checked out as soon as something feels off. The earlier a condition is caught, the more options your vet has.
Does pet insurance cover autoimmune disease in dogs?
Managing an autoimmune condition is a long-term commitment. Between the initial diagnostics, ongoing medication, and regular monitoring bloodwork, costs can add up quickly. And that’s before factoring in any acute episodes that require hospitalization.
If your dog first shows signs or symptoms of an autoimmune disease after your Lemonade Pet policy is active, and your waiting periods have passed, a base accident and illness policy can help cover those costs: including diagnostics, treatment, and ongoing medication. Because autoimmune diseases can develop gradually and early signs are easy to miss, it’s worth getting coverage in place early, before anything shows up.
One important thing to keep in mind: if your dog was already showing symptoms before you signed up, or during the illness waiting period, the condition would be considered pre-existing and wouldn’t be covered.
Before we go
A diagnosis like this can be a lot to take in. But autoimmune disease in dogs, while serious, is something many dogs live with well, especially when it’s caught early and managed carefully. Keep an eye out for symptoms, work closely with your vet, and don’t put off getting checked out if something feels off. The sooner you have answers, the sooner you and your dog can move forward together.
Frequently Asked Questions
Can autoimmune disease in dogs be cured?
Most autoimmune diseases in dogs can’t be cured, but they can be managed well. The goal of treatment is to calm the immune system enough to stop it from attacking the body, while keeping your dog healthy enough to handle the medication. With the right treatment plan and consistent monitoring, many dogs go on to live comfortable, happy lives. The exception is when an underlying trigger, like a specific medication or infection, can be identified and removed.
Are certain dog breeds more prone to autoimmune disease?
Yes. Certain breeds are more genetically predisposed, including Cocker Spaniels, Poodles, German Shepherds, Beagles, and Shetland Sheepdogs. For discoid lupus specifically, German Shepherd dogs, Siberian Huskies, Collies, and Shetland Sheepdogs are more commonly affected. That said, autoimmune diseases can affect any dog. Breed predisposition is a risk factor, not a guarantee.
How serious is IMHA in dogs?
IMHA is one of the more serious autoimmune conditions a dog can face. Even with prompt treatment, it carries a high mortality rate, with studies suggesting 18 to 44% of dogs don’t survive the first few weeks after diagnosis.
A few quick words, because we <3 our lawyers: This post is general in nature, and any statement in it doesn’t alter the terms, conditions, exclusions, or limitations of the policies issued, which differ according to your state of residence. You’re encouraged to discuss your specific circumstances with your own professional advisors. The purpose of this post is merely to provide you with info and insights you can use to make such discussions more productive! Naturally, all comments by, or references to, third parties represent their own views, and Lemonade assumes no responsibility for them. Coverage may not be available in all states. Please note that statements about coverages, policy management, claims processes, Giveback, and customer support apply to policies underwritten by Lemonade Insurance Company or Metromile Insurance Company, a Lemonade company, sold by Lemonade Insurance Agency, LLC. The statements do not apply to policies underwritten by other carriers.
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