A Guide to Safely Using Supplements for Canine Hemangiosarcoma

The moment you’re facing hemangiosarcoma, whether it’s suspected, diagnosed, or you’re in that awful waiting period for results, you’ll feel like no effort is too much.

You look at your pup’s face, and a question inevitably arrives: What else can I do for you?

Hemangiosarcoma isn’t really on any owner’s radar until they’re living it for the first time. And you’ll definitely go looking for answers in social media groups, in blogs, wherever you can find them.

One of the first things you’ll come across is holistic supplements. A 2021 study found that among 254 owners of pets with cancer, 65% gave them some type of complementary supplement. But 57% never discussed it with their veterinarian.

This article isn’t going to pit standard treatment against alternative treatment, or tell you one is better than the other.

That decision belongs to you and your veterinary team, made with care, based on yours and your dog’s situation and whatever path you feel most at ease with.

Instead, we’re offering a framework for how to safely consider supplements as part of an integrated plan. With a real emphasis on the conversations that will protect your dog’s wellbeing and your peace of mind.

To help us navigate this, we spoke with Dr. Charles Loops, a holistic veterinarian with over 35 years of experience in homeopathic and integrative cancer care. He sees twenty to thirty dogs with hemangiosarcoma a year, and his insights form the backbone of this guide.

Part 1: What You Must Accept First

  
Before you open a single browser tab or add anything to a cart, you need to take a deep breath and anchor yourself to two realities. They won’t be easy to sit with, but they will protect you from acting from a place of desperation and your dog from harm.
 

Hemangiosarcoma is unpredictable.

 

This cancer works fast, and metastasis doesn’t exactly follow a neat timeline. Dr. Loops offers a perspective grounded in decades of experience: “This is not a curable cancer, unfortunately, but I have seen remissions of up to two years in a few patients treated with homeopathy.”

His follow-up observation is just as important: “In general, I feel they often survive longer and with a better quality of life than with any other form of treatment.”

So let that be your north star.

Not a guarantee of a cure, but the real possibility of meaningful time and genuine quality of life. Those two-year remissions are real, but they’re the exception, not a promise.

Your goal isn’t to beat a statistic. It’s to maximize your dog’s comfort and joy through careful, loving management.

Holding this in your heart can help release that very common guilt: the feeling that you didn’t do enough, or that your dog couldn’t outrun some number because you didn’t buy something off a list.

The Regulatory Loophole Around Supplements

 

Unlike pharmaceuticals, most supplements in most parts of the world are regulated more like pet food than medicine.

So they don’t go through the same clinical trials or quality checks. That means the amount of active ingredient on the label isn’t always what’s actually inside. And yes, products can be contaminated, mislabeled, or aggressively marketed to owners who’d do anything for their dog.

This isn’t meant to scare you away from holistic care. Not at all. It’s just context, so you can walk into this with your eyes open.

Herbal and supplemental medicine takes knowledge and a little care—but with the right guidance, you can tune out the noise and find the things that genuinely help your dog feel their best. A good, specialized vet in your corner makes all the difference.

 

Part 2: Standard Care and Supplements

  

You’ll read conflicting advice online—the ones who swear by standard care, and those who praise holistic methods exclusively.

Sometimes browsing is enlightening, but it can leave you more confused and overwhelmed than when you started. What’s happening nowadays is that more veterinarians are seeing the benefit of blending both approaches—or will recommend a certain path because they feel your dog’s situation, the stage they’re at, and their overall health can benefit when managing this disease.

Dr. Loops sees this firsthand. “Many of the patients I treat are choosing other concurrent therapies as well,” he says, “and I treat them the same with similar results.”

From his decades of practice, he views surgery as the most impactful standard therapy for hemangiosarcoma. But whether you’re blending or sticking with one path, there’s a delicate balance to all of this. Let’s walk through what to keep in mind.

What to Watch for With Chemotherapy

 

Different supplements can interact with chemotherapy in different ways, some affect how the liver processes drugs, others may impact clotting or immune response. Yunnan Baiyao, for instance, is believed to alter liver metabolism. Many herbs and mushrooms have antioxidant properties that can potentially interfere with how chemotherapy and radiation work.

None of this automatically means danger, but it’s exactly why being fully transparent with your vet and having a clear plan matters so much. You want a vet in your corner, helping you navigate timing.

Some may recommend starting supplements like Yunnan Baiyao a few weeks after chemotherapy begins, so they can monitor how your dog responds to each treatment separately. Others will have you start supplementation right away to help manage symptoms. The key is to ask the question, tell your vet everything you’re giving, and let them guide you.

The Risk of Doing Too Much Too Fast

 

You’ll feel the urge to waste no time and start everything at once. It’s understandable. It’s rooted in love. But it can backfire.

Dr. Loops cautions: “I definitely see gastrointestinal issues such as vomiting, nausea and diarrhea from giving too many supplements to occasional patients.”

Here’s why this is especially tricky: if your dog is receiving chemotherapy or radiation (which commonly cause GI side effects), adding multiple supplements at once creates a confusing guessing game. But even if they’re not, starting everything together makes it hard to know what’s actually helping and what might be causing a problem. When vomiting or diarrhea starts, is it from a supplement? A combination? An emergency situation from the cancer? A sudden diet change you also made?

This makes it nearly impossible for your vet to pinpoint the cause and adjust treatment effectively. It can lead to stopping something helpful unnecessarily, or delay addressing a real reaction or disease progression.

His advice is simple but vital: “Supplements should be started one at a time to avoid these GI issues.” A slow, monitored approach protects your dog’s comfort, your vet’s ability to provide the best care, and makes it easier to spot what’s actually making your dog feel like themselves again.

 

Part 3: Dr. Loops on the Most Asked Questions

  
In the search for answers, certain questions come up again and again. Dr. Loops’ answers cut through the noise with clarity.

On DIY Dosage Charts

 
“I see dosage calculations online based on weight. Are they safe?”

“It is difficult to know if dosages are correct or even therapeutic unless you are working with a practitioner that is familiar with the products,” he states.

This isn’t about gatekeeping expertise. It’s about the reality that potency, absorption, a dog’s individual metabolism, and their broader health indicators like organ function, other medications, even their energy levels and appetite, which are variables no online calculator can solve.

Effective dosing exists on a spectrum. Finding the right point takes a trained eye that can read your whole dog, not just their weight.

If you truly have no choice but to navigate on your own, he suggests going directly to manufacturer websites or looking for dosage recommendations from veterinarians in articles and blogs.

 

On Cost Versus Quality

“Turkey tail extracts range from $20 to $200. Is the most expensive necessary?”

“I am not a fan of I’m-Yunity and its ridiculous price,” he says plainly. “I think other turkey tail supplements from reputable companies are just as valuable and much cheaper.”

He further advises that turkey tail be given “along with a general mushroom supplement as well,” explaining that this combination is part of his most effective approach.

On Changing Protocol

 
“Should supplements and doses change depending on the disease stage?”

Dr. Loops suggests simplicity and stability are often best. “That’s very difficult to say. As a general rule, I would think not.”

He uses Yunnan Baiyao as the prime example: the protocol is typically a standard preventive dose, shifting to an acute dose only during active or suspected bleeding.

Part 4: Knowing The Most Common Supplements

  
Think of these as tools in a professional’s toolkit, each with a specific purpose, each best used by skilled hands.

This isn’t a substitute for veterinary care, just a place to start.

Yunnan Baiyao

 
What it is: A Traditional Chinese Medicine formula of undisclosed composition, believed to be strongly composed of ginseng.

What it does: It is thought to help by activating platelets to enhance clot strength and by preventing new blood vessel growth (angiogenesis), which can reduce bleeding from tumors.

Dr. Loops on dosing: A standard preventive dose, shifting to an acute dose only during active or suspected bleeding.

A note from us: If you ever need to use the red pill, the one with a higher dose meant for bleeding emergencies, tell your vet immediately. They need to monitor and determine if it’s a small rupture that can be managed at home, or a larger emergency that needs professional intervention.

Turkey Tail Mushroom

 
What it is: A medicinal mushroom (Coriolus versicolor) containing peptides that support immune function.

What it does: It is believed to boost the immune system and help manage side effects from chemotherapy. Its mechanisms may also help delay metastasis.

SAMe and Milk Thistle

 
What they are: Antioxidants that support and protect the liver.

What they do: Often used during chemotherapy to help the liver maintain its function, process drugs, and protect it from toxicity.

Beyond These Three

 
Dr. Loops points owners toward lesser-known paths that may hold promise, such as Hoxsey formulas or Essiac blends, while honestly noting their track record is less established for hemangiosarcoma than for other canine cancers. He adds that “herbal solutions both Western and Chinese that are focused on cancer can also be useful.”

Part 5: Not All Hemangiosarcoma Is the Same

  

Most online discussions—and most studies—focus on splenic hemangiosarcoma. It’s the most common form, and it drives a lot of the standard advice you’ll find about supplementation.

But your dog’s situation may look different.

Dermal and subcutaneous HSA behave differently than internal tumors. So does heart-based HSA, which is visceral but far less studied—leaving owners with even less guidance. And if your dog was diagnosed after metastasis has already occurred, the conversation shifts again.

This is why an experienced practitioner matters so much. Dr. Loops, with 35 years of seeing every variation this cancer takes, is exactly the kind of specialist who can adapt protocols to your dog’s specific location, stage, and symptoms.

Part 6: Before You Buy Anything Have Your Action Plan

  
You’ve read the warnings. You’ve heard from Dr. Loops. Now here is exactly how to move forward.

          1. Start with your veterinarian.

Begin the conversation: “I’m interested in integrative options. How can we explore this safely alongside your treatment plan?” Full transparency is your dog’s best protection. If your vet or oncologist is unfamiliar with a supplement you’re considering, they can help you research or refer you to someone who knows more.

This first conversation is also the right time to mention if you’re considering a clinical trial. If you’re thinking about enrolling your dog—whether for financial reasons or a chance at breakthrough care—most trials won’t accept dogs who are already on supplements. They may require a washout period of weeks to ensure any traces are cleared from your dog’s system. So before starting any supplementation, take a moment to weigh all your options.

 

          2. Find a qualified integrative veterinarian.

This is the step most owners skip, and it’s the most important. Ask your team for a referral, or seek a veterinarian certified in herbal medicine through organizations like the American Holistic Veterinary Medical Association.

Dr. Loops, for example, offers phone consultations and can be reached at www.charlesloopsdvm.com. His website has an article he wrote on hemangiosarcoma, and his practice is entirely by phone, making specialized integrative care accessible no matter where you live.

          3. Introduce one supplement at a time.

Heed Dr. Loops’ warning. Start slowly. Wait at least a few days to a week before adding anything new. Track everything, doses, timing, and any changes in your dog’s behavior, appetite, or stool. This record is gold for your vet.

          4. Source smartly, not desperately.

Choose reputable companies that provide transparency about ingredient sourcing and third-party testing. If a brand won’t answer basic questions about their product, move on. Your due diligence matters more than any label claim.

          5. Keep the goal in focus.

Return to Dr. Loops’ observation about homeopathic treatment: “The side effects of homeopathic cancer treatment offer an increase in well-being, often helping with appetite and providing an increase in energy.”

That is the true measure of success with your treatment plan. 

A Final Word

  

The drive to find the perfect combination, the formula that will keep your dog with you longer, comes from a place of profound love.

But by prioritizing safe integration over hopeful experimentation, you honor that loving instinct without compromise. You walk this difficult road with greater confidence, greater clarity, and greater peace of mind.

The best thing you can do for your dog is to have a fully informed, coordinated care team by your side. People who can help you navigate this complex path safely.

So take your focus off willing your dog to stay longer, and instead spend that energy enjoying them as fully as you can, right now.

Let the goal be more feeling-good days to create more memories together.

 
 
Special thanks to Dr. Loops for taking the time to answer our questions for this article and for sharing his tremendous expertise with our readers.
 
 
 
 
 
 
 
 

Sources

https://www.petmd.com/dog/general-health/yunnan-baiyao-dogs
https://www.thepetoncologist.com/blog/yunnan-bai-yao
https://www.veterinarypracticenews.com/pros-and-cons-of-supplements-in-treating-pet-cancer/
https://www.dogcancer.com/articles/supplements/medicinal-mushrooms-for-dogs/
https://todaysveterinarypractice.com/wp-content/uploads/sites/4/2021/02/TVP-2021-0304_Cancer_Patient_Supplements.pdf