What is FCE? Understanding Fibrocartilaginous Embolism in Dogs
After carefully running his hands down the spine of the little 12 pound white maltipoo in front of him, and doing some type of physical assessment, he announced,
“Your dog had a spinal stroke.”
Already in a panic from watching Max lose the sudden use of his legs from our morning walk earlier, I couldn’t quite seem to grasp what the vet was saying.
My mind raced.
“Are you sure? Could it be tick paralysis? We were out hiking a few weeks ago, and I found a bunch of ticks on him when we were done.”
“Or could it be an infection from Campylobacter bacteria? I read somewhere a dog experienced paralysis after eating raw chicken”.
I had given Max raw chicken necks earlier that week, and I was trying to think of any other possible explanation except the one that Dr. B just told me.
Dr. B slowly shook his head, and gave me that look that I’m sure he gives often to pet parents who are in denial.
“No. I’ve seen a few cases like this before during my years of practice. The only way to officially diagnose an FCE is with an MRI.”
He left. Then came back with a print-out of an explanation of what an FCE is and a couple of meds. Gabapentin for pain, and prednisone, a steroid. (Both commonly prescribed medicines, and both completely unnecessary medications that hinder the healing process. But more on that later.)
I still had questions.
“Can you do an MRI here? How much does it cost? What happens after diagnosis?”
“Will he be able to walk again?”
If you’re here reading this, I can only imagine the despair you must be feeling. The same exact way I felt after receiving the news on Saturday, September 23rd, 2023.
I received an answer for what happened. But an unclear path on how to move forward.
This is why I decided to put together this site. An all-in-one guide on what to expect in the recovery process, and helpful tools to aid in the healing journey.
Dr. B finally responded to my last question with a doubtful look, “Lots of physical therapy and time.”
When I got back from the vet, I spent the next 48 hours combing the internet for anything and everything about spinal strokes. Information on recovery was scattered, and prognostic outcomes seemed limited. Seemingly, most vets recommended euthanasia, but on the dog agility forums, owners were saying recovery was possible. Most dogs made some type of the recovery. The ones that didn’t, were the ones with owners that gave up on them.
I can’t speak for every owner, and perhaps that’s why Dr. B responded the way he did. Maybe he’s used to seeing people give up. But the fact that you’re here, proves you’re different. I won’t sugarcoat it: this journey will challenge you. It will bring you to tears and make you want to scream. But if you’re lucky, your dog’s resilience will do more than just amaze you. Watching your dog fight back is nothing short of miraculous, and the bond you’ll forge is worth every tear. I hope this website makes the path ahead a little easier to navigate.
So what is an FCE exactly?
FCE stands for fibrocartilaginous embolism. It is a sudden blockage of blood supply to part of the spinal cord, or a spinal stroke.
The spine contains intervertebral discs, which are cushion-like structures between the vertebrae. These discs have an outer shell (the annulus fibrosus) and an inner gel-like core (the nucleus pulposus). Under certain circumstances, most often during physical activity, a microscopic fragment of fibrocartilage from this disc material enters the arterial blood supply to the spinal cord. The fragment lodges in a small blood vessel, blocking the flow of oxygenated blood to a section of the spinal cord.
What follows is ischemia: oxygen deprivation to the neural tissue in that region. The cells in that section of the cord are damaged or destroyed by the lack of oxygen, the same as in a human stroke, but in the spinal cord rather than the brain.
The damage occurs in minutes. And then, most importantly, it stops.
This is one of the most important things to understand about FCE: it is not progressive. The embolism lodges, the damage occurs, and the injury stabilizes. Most of the damage occurs in the first 24 hours and is effectively the ceiling of the initial injury, not the beginning of a worsening spiral. There is no ongoing compression, no continued blockage to remove, nothing that is still actively damaging the spinal cord after the first day.
Why FCE is not the same as IVDD
This distinction matters more than almost anything else, because the treatments are opposite.
IVDD (intervertebral disc disease) involves disc material pressing on the spinal cord, causing compression and ongoing damage. The treatment for IVDD is often surgery to remove the compressing material, and the time window for that surgery is limited.
FCE involves no ongoing compression. There is nothing to remove surgically. Surgery is not indicated. The treatment is rehabilitation, and getting the dog moving, stimulating the nervous system, and letting the spinal cord repair itself over time as soon as possible.
If a vet tells you that surgery is needed for an FCE diagnosis, seek a second opinion from a veterinary neurologist. (See the full comparison: FCE vs. IVDD vs. ANNPE )
What causes FCE, and why it happens
The exact mechanism by which fibrocartilage enters the vascular system is not fully understood. The leading hypothesis is that a piece of nucleus pulposus material is driven into a disc’s blood supply under pressure, which is why FCE so often occurs during or immediately after physical activity: running, jumping, playing, or even just a vigorous walk.
The event is typically sudden and painless. One moment your dog is fine; the next, they are stumbling, falling, or unable to use their limbs. There is no warning. There is nothing you could have done to prevent it.
This is not your fault.
Which dogs are most affected
FCE can occur in any dog, but certain patterns emerge:
Size: Medium to large breeds are disproportionately represented. Small dogs can get FCE, but it is less common.
Age: Most commonly seen in middle-aged dogs (4–8 years), though FCE occurs in younger and older dogs as well.
Activity level: Athletic, active dogs seem to be at higher risk, which is consistent with the exercise-trigger hypothesis.
Breed predisposition: Several breeds appear more commonly in FCE case reports, including Labrador Retrievers, Golden Retrievers, German Shepherds, Rottweilers, Greyhounds, Irish Wolfhounds, Miniature Schnauzers, and Shetland Sheepdogs. However, no breed is immune.
Max is a maltipoo, who was four years old and in excellent physical condition when his FCE occurred. In fact, we had just gotten back from a hiking trip up north just a week ago. Aside from being a hot, muggy morning, there was nothing unusual about that morning’s walk.
What it looks like when it happens
The presentation of FCE is recognizable once you know what to look for, though in the moment it is terrifying and confusing.
Onset: Sudden. Seconds to minutes. Often during or immediately after exercise.
Initial signs: Stumbling, ataxia (drunken walking), sudden weakness or collapse in one or more limbs. Some dogs cry out briefly; most do not. The absence of crying is a clue — FCE is typically painless.
Progression: Symptoms may worsen slightly in the first few hours as secondary inflammation peaks, then stabilize. After 24 hours, the deficit is usually at its maximum and should not progress further.
Asymmetry: FCE often affects one side more than the other, or affects only the hind limbs, depending on where in the spinal cord the embolism occurred. This asymmetry is diagnostically helpful. While Max was initially both hind legs paralyzed, he started showing improvement during that following week, with his left leg being worst than his right.
Pain: Dogs with FCE are typically not in significant pain. They may be confused or anxious, but they are not usually crying, guarding their spine, or refusing to be touched. This distinguishes them from IVDD dogs, who are often in considerable distress. When Max and I got back from our walk, he fell down into a lay position and looked up at me, looking confused but not really understanding why I seemed so upset.
How FCE is diagnosed
MRI is the definitive diagnostic tool. On MRI, FCE typically appears as a region of increased signal intensity within the spinal cord at the level of the embolism — consistent with ischemic injury. MRI requires referral to a veterinary specialist and is not always immediately available.
Clinical diagnosis is how many FCE cases are managed. An experienced veterinary neurologist can often make a confident working diagnosis based on: the acute onset, the activity trigger, the non-progressive course, the absence of pain, the neurological grade, and the breed. Many owners, like me, manage FCE successfully without MRI confirmation. I was also lucky that the vet I saw specialized in orthopedics. He had years of experience and had encountered similar cases in the past, so was able to be fairly confident in giving me an FCE diagnosis.
I opted not to do an MRI, even though I had pet insurance at the time. Partially because of the vet’s confidence in his diagnosis, and also, mostly because I knew the MRI diagnosis wouldn’t change the treatment outcome. I didn’t want to stress Max out with the scan, given his personality and history (fear aggression/reactivtity. **Skip the MRI and save the money and put it towards PT/ccupuncture/cold laser therapy instead. Treatment plan does not change regardless of results.**
X-rays will appear normal in FCE — the fibrocartilage is not visible on plain radiograph. A normal X-ray does not mean nothing is wrong.
The Olby / Modified Frankel scale is used to grade neurological function from Grade 1 (pain only, ambulating normally) to Grade 5 (complete paralysis, no deep pain perception). Ask your vet where your dog falls. Write it down. It becomes your baseline for measuring recovery. Max’s condition was a Grade 4, which indicates a paraplegic dog with intact deep pain perception
Prognosis: what to expect
Every dog’s case is unique, but in general, FCE has a genuinely good prognosis in most cases. Particularly when:
- Deep pain sensation is retained in the affected limbs
- Improvement begins within the first 2–4 weeks
- Formal rehabilitation is started promptly
Studies and clinical experience suggest that the majority of FCE dogs show meaningful improvement, and a significant proportion recover fully or near-fully. Dogs who retain deep pain sensation and begin showing early improvement have the best outcomes.
Recovery timeline varies enormously. Most of the major improvement occurs in the first 6 months. But this is something I want to emphasize because no one told me — recovery can continue well beyond 6 months. Max was still making improvements at 18 months. At 2.5 years, with the addition of chiropractic and homeopathy, while improvement was much, much slower, he still gradually made improvements, and honestly, I would say he is at 98% function. His only noticeable neural deficits is when I force him to slow walk, and then his gait definitely becomes noticeably off.
I want to emphasize that healing the nervous system is slow. Nerve regeneration is measured in millimeters per day. Give it time. Time, patience, and love are probably some of the best things you can give your dog along with as much physical therapy exercises (whether at a formal clinic or at home) as possible.
Grade 5 (no deep pain sensation): Dogs who have lost all deep pain perception face a more uncertain prognosis. Recovery is possible but is less likely to be complete, and can be a more challenging journey than dogs that are less seriously affected. These cases deserve thoughtful, individualized decision-making with a veterinary neurologist, not an automatic euthanasia recommendation. At the end of the day though, only you can determine your dog’s quality of life and what makes sense for the both of you. It is not an easy decision, either way.
The most important things to do right now
1. See a veterinary neurologist. If you have not yet seen a neurologist, make that appointment now. A general vet can provide supportive care, but neurological grading, prognostication, and rehabilitation guidance require specialist expertise.
2. Understand the diagnosis. FCE or IVDD? The answer changes everything about what happens next. Push for clarity. (FCE vs. IVDD vs. ANNPE)
3. Start rehabilitation as soon as possible. Do not wait for “more improvement” before starting rehab. For FCE, early rehabilitation is not optional — it is the treatment. (Rehabilitation guide). If you’re not near a rehabilitation center or can’t afford it, you can still do exercises at home.
4. Learn manual bladder expression if needed. If your dog cannot urinate voluntarily, this is the most urgent practical skill you need before going home. (Bladder care guide)
5. Find community. The FCE Dogs Facebook group is one of the most valuable resources available. Other owners who have been through this are an extraordinary source of knowledge, support, and hope.
6. Come back to this site. We have guides for every aspect of FCE recovery: physical therapy, acupuncture, laser therapy, electrical stimulation, supplements, nutrition, home exercises, caregiver mental health, and recovery stories from owners who’ve been where you are.
From one owner to another
Max went down on a Saturday morning in September 2023. By the end of the week, I had read everything I could find and knew it was almost certainly FCE.
By October 5th, he was in his first rehabilitation session. At six months, he was 80% recovered. Today, two and a half years later, he is at 98%.
You will find your way through this. The road is long and it is not a straight line. But most dogs with FCE recover significantly and will retain an excellent quality of life. The nervous system, and your dog, is resilient in ways that will surprise you. And the way your relationship/bond changes with them will inspire you.
Keep going.
All information on FCEDogs.com is for educational purposes only and does not constitute veterinary advice. Always consult a licensed veterinarian or veterinary neurologist for your dog’s specific situation.
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