The Top 5 Best Milk Thistle Supplements for Dogs

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The extract from the seeds of the flowering milk thistle plant is silymarin, which is the best milk thistle for dogs. Silymarin has many beneficial properties and is especially useful to improve liver function. Negative side effects from this natural extract are rare, so it is considered safe for dogs. The following milk thistle for dogs reviews and ratings can help you learn more about milk thistle and choose the best product for your dog’s needs.

The 5 Top Dog Milk Thistles

Editor’s Picks Brand Rating *
Best Choice Vita Pet Life Milk Thistle for Dogs with Liver and Kidney Support ♥♥♥♥♥
Premium Pick Pet Wellbeing Dog Milk Thistle for Essential Canine Detoxification ♥♥♥♥♥
Best Value Jarrow Formulas Silymarin Marianum Milk Thistle for Dogs ♥♥♥♡♡
Runner Up Certified Organic Milk Thistle Powder for Dogs and Cats ♥♥♥♥♡
Honorable Mention United Nutritionals – Multivitamin and Milk Thistle for Dogs ♥♥♥♥♡
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* Ratings are determined using our specialized rating system.

I enjoy volunteering at the animal rescue because dogs show so much appreciation. I see malnourished and sickly dogs turn into adorable miracles with loving care. I have reviewed milk thistle for dogs to help you select the right product to use if your pet is ill. Read on to discover the best products available on the market today.

★ Best Choice
Best Choice for Best Dog Milk Thistle: Vita Pet Life Milk Thistle for Dogs with Liver and Kidney Support

Vita Pet Life Milk Thistle for Dogs with Liver and Kidney Support is the best milk thistle for dogs because it is made from natural ingredients, is bacon and liver flavored, and has many overall health benefits.

The Vita Pet Life Milk Thistle for Dogs with Liver and Kidney Support is a chewable tablet that is bacon and liver flavored. It comes in a bottle of 120 tablets, and this formulation is made from natural ingredients and contains extracts from milk thistle, dandelion, yellow dock, nettle root, St. John’s Wort (a wildflower), and cordyceps sinesis.

Cordyceps sinesis goes by the common name of “caterpillar fungus.” This fungus grows on the outside of caterpillar larvae. The extract from this substance has many benefits proven by scientific research.

The ingredients in this formula are the antioxidant L-arginine, EPA and DHA from fish oil, stearic acid (a fatty acid), desiccated liver, lecithin, dicalcium phosphate, potassium, inositol (B8), choline bitartrate (a nutrient made from the tartaric acid found in grapes), folic acid (B9), and the vitamins B1, B2, B6, and B12. Other ingredients include microcrystalline cellulose (finely processed wood pulp used as a binder), silicon dioxide (anticaking agent), and bacon flavor.

This comprehensive formula is useful for liver/kidney detox, illness, recovery, and dogs with chronic liver problems, hepatitis, kidney problems, and trouble with bladder control due to kidney problems. This product is non-GMO and does not contain allergens, byproducts, or animal digest.

Pros

  • The laboratory making this product is an FDA-registered facility
  • The lab has a certification from the National Science Foundation (NSF) and for good manufacturing practices (GMP)
  • Manufacturer offers a 100% satisfaction, money-back guarantee

Cons

  • As with all chewables, a small percentage of dogs do not like the smell/taste
♛ Premium Pick
Premium Pick for Best Dog Milk Thistle: Pet Wellbeing Dog Milk Thistle for Essential Canine Detoxification

Pet Wellbeing – Milk Thistle for Dogs for Essential Detoxification Support for Canines is the best milk thistle for dogs because it is safe for both cats and dogs, contains natural ingredients, and comes in a liquid form for easy administration.

The Pet Wellbeing – Milk Thistle for Dogs for Essential Detoxification Support for Canines is safe for both dogs and cats. This is a liquid supplement, which comes in the option of a two-ounce or four-ounce bottle. The ingredients are certified organic and ethically harvested in the wild. Some ingredients are imports; however, the formulation, mixing, and purification processes happen in the USA. This product undergoes testing for purity.

For those looking for pure milk thistle seed extract, this product is a good choice. The bottle has a dropper that gives five drops when full. A milliliter of the liquid is 20 drops and that equals a total dosage of 333 milligrams of Silybum Marianum, calculating to about 16 milligrams per drop.

Veterinarians recommend a daily dose of 75 to 100 milligrams for every 10 lbs. of your pet’s body weight. If you use five drops of this liquid supplement for every 10 lbs., then that is around an 80 milligram dosage. The manufacturer says you can give one drop per pound and it is safe. Shake the bottle before use. The manufacturer recommends a veterinarian examination of your pet before using this product.

Besides the active ingredient of the best milk thistle for dogs, the inactive ingredients in this formulation are deionized water, natural bacon flavor, and vegetable glycerin. This extract provides support for the liver’s normal functions to remove toxins and the elimination of waste.

Pros

  • 100% natural ingredients that are gentle enough for long-term use
  • Only active ingredient is the milk thistle seed extract
  • Safe for both dogs and cats
  • Manufacturing process follows the FDA’s Center for Veterinary Medicine (CVM) guidelines

Cons

  • As with all supplements, a small percentage of pets do not like the smell/taste and may throw up the first time(s) they are given
$ Best Value
Budget Choice for Best Dog Milk Thistle: Jarrow Formulas Silymarin Marianum Milk Thistle for Dogs

Jarrow Formulas Milk Thistle (Silymarin Marianum) is the best milk thistle for dogs because it helps the immune system, boosts liver function, and is an antioxidant.

The Jarrow Formulas Milk Thistle (Silymarin Marianum) is the low-cost choice, and each bottle contains 200 veggie capsules. Each capsule contains 150 milligrams of Silymarin Marianum. There is also a 100-count bottle for those who want to try this before purchasing the larger size.

As with all the best milk thistle for dogs, this product helps the immune system, boosts liver function, and is an antioxidant. For humans who want to try this product, talk with a health care professional before taking it, especially if you are pregnant, lactating, trying to conceive, or under the age of 18. If you use this supplement for your pets, then one capsule daily is the dosage for a dog weighing 20 to 40 lbs.

Pros

  • Made for humans and safe to use for pets
  • One capsule is the daily dose for a dog up to 40 lbs.
  • Bottle contains 200 capsules and can last for six months or more depending on the dog’s size

Cons

  • Pets may not like taking a capsule
♥ Top Pick
Runner Up for Best Dog Milk Thistle: Certified Organic Milk Thistle Powder for Dogs and Cats

Certified Organic Milk Thistle Powder for Cats and Dogs is the best milk thistle for dogs because it comes with a satisfaction guarantee, is safe for both cats and dogs, and contains enough product for up to a four-month supply.

The Certified Organic Milk Thistle Powder for Cats and Dogs is easy to mix with either wet or dry food. For pets that are small to medium-sized, the six-ounce (170 grams) jar contains enough for a four-month supply. The only active ingredient in this product is milk thistle extract from organic sources. I found the dosage mentioned, but not officially, of a one-eighth teaspoon for cats and one-quarter teaspoon for dogs around 40 lbs. I could not find the milligrams of milk thistle extract per teaspoon, so I cannot tell you the actual strength of this product.

Pros

  • ECO certified
  • Manufacturer offers a 100% satisfaction guarantee with full refund or replacement

Cons

  • I could not find a complete ingredients list or clear dosage recommendations based on a pet’s weight
♥ Top Pick
Honorable Mention for Best Dog Milk Thistle: United Nutritionals - Multivitamin and Milk Thistle for Dogs

United Nutritionals – Multivitamin and Milk Thistle for Dogs is the best milk thistle for dogs because it contains many ingredients to benefit your dog’s overall health. The laboratory is an FDA-registered facility and has a certification from the National Science Foundation.

The United Nutritionals – Multivitamin and Milk Thistle for Dogs is an “all-in-one” formulation that comes in a bottle of 60 or 120 chewable tablets. The recommendation is to give one per day for every 25 lbs of your dog’s weight.

The supplement has the vitamins A, B1, B2, B6, B12, C, D3, and E. It contains glucosamine (joint support), MSM, EPA-DHA (omega fish oil), milk thistle (liver support), lactobacillus acidophilus (probiotic), pancreatin 4X, niacin (mineral nutrient), coenzyme Q10 (digestive enzyme), pantothenic acid (B5), manganese (mineral nutrient), folic acid (B9), biotin (vitamin H), and chondroitin (found in joint cartilage). The other ingredients are dicalcium phosphate, desiccated liver, microcrystalline cellulose, bacon flavor, magnesium stearate, stearic acid, and silicon dioxide.

This supplement is for much more than the best milk dog thistle for dogs because it contains so many other ingredients. The amount of milk thistle it contains, per chewable tablet, is 60 milligrams. This is an appropriate dosage for a pet that weighs about 25 lbs. This supplement is nice if you need to give the other minerals and vitamins to enhance liver support and improve general health.

Pros

  • Laboratory is an FDA-registered facility and follows good manufacturing practices (GMP)
  • Laboratory has a certification from the National Science Foundation (NSF)

Cons

  • A small percentage of dogs do not like the taste/smell and format of these chews

Features to Consider for the Best Dog Milk Thistle

The main considerations for choosing the best milk thistle for dogs are the formulation, quality, and smell/taste.

Formulation

I reviewed both single-focus products that only have the best milk thistle for dogs as the active ingredient as well as comprehensive formulations that include milk thistle extract and many other vitamins, minerals, enzymes, probiotics, and nutrients.

The best way to decide on the formulation is to talk it over with your veterinarian. One thing to be aware of is more is not always better because there can be an interaction between compounds that is not desirable.

You want a supplement that helps but does not give unnecessary things because the liver processes the blood that contains all the supplements and medications used. It is counterproductive to try to improve liver function while also overloading the system with medications and other dog vitamins. One excellent use of milk thistle is to detox the liver and clean it of the excessive chemical toxins that accumulate from taking medications.

Quality

The quality comes from the source of the milk thistle seed used to make the extract and how the product is manufactured. It is preferable that products be all-natural, organic, and free from GMOs.

The top manufacturing facilities are in the United States and registered by the FDA. They follow the FDA’s Center for Veterinary Medicine (CVM) guidelines. Laboratories that use good manufacturing practices (GMP-certified) are likely to produce high-quality products. Another certification to look for is a certification from the National Science Foundation (NSF).

Smell/Taste

Dogs have an amazing sense of smell. It is the strongest sense that they have. Even products that are “tasteless” to humans may have an odor that a dog can recognize. If you watch a dog carefully, they sniff everything before they eat it. If something smells off to them, they may refuse to eat it. Part of this is that dogs are natural scavengers. In the wild, they sort through food by smelling for the good parts and thereby avoid eating the rotten parts that may make them sick.

You may buy one of these products from the best milk thistle for dogs reviews and find out afterward that your pet refuses to eat it or any food that contains it. Normally, it is not the product that is defective, it is simply your dog does not like the smell/taste. You can try to disguise the smell by giving it mixed with some favorite food that has a stronger odor to mask the smell of the supplement.

Benefits of Using Dog Milk Thistles

The beneficial chemical compound in the best milk thistle for dogs is Silymarin. This compound has a long history of human use for its beneficial medicinal purposes. It is useful to support healthy liver function.

The use of milk thistle for dogs and cats is more recent, and the benefits are similar as found in humans. The best milk thistle for dogs is a powerful antioxidant that reduces the production of free radicals. This means for damaged livers, it helps with detoxification. If your pet has to take medications that are toxic to the liver function or has some type of liver disease, using Silymarin will support the liver function for faster recovery.

Precautions of Using Dog Milk Thistles

The side effects of the best milk thistle for dogs are very rare and require large doses to occur. The typical daily dose is about 80 to 150 milligrams. If a dog takes more than one and one-half grams (1,500 milligrams), which is ten times the recommended daily dose, this may cause the production of excessive bile by the liver. If the liver is over-stimulated, then the extra bile may cause diarrhea.

There is not enough research done on pregnant animals and those who are lactating. To be safe, do not give this supplement to pregnant dogs or mothers who are nursing puppies.

I always recommend talking with your veterinarian about any use of supplements for your pets. If your pet is taking any other medications or supplements, whether it’s dog taurine supplements or other liver supplements for dogs, discuss this supplement with your veterinarian first before trying it to be sure there are no known negative interactions with other drugs.

If you cannot do this, the next best thing is to be an informed consumer and use the Internet to do research. Gather information from reliable resources. High dosage levels of milk thistle for dogs is for pets that are ill or in recovery and not recommended for long-term use in healthy dogs because this can reduce the liver’s natural functions. A smaller daily dose is recommended for long-term use.

Conclusion

My choice for the best milk thistle for dogs review is the Vita Pet Life Milk Thistle for Dogs with Liver and Kidney Support. I like the comprehensive formulation and noticed a better response than when I gave milk thistle alone. The price is reasonable and I trust this brand. The brand is changing its name to Coco and Luna. The product is still the same as the Vita Pet brand. This product works well when you have blood tests done by your veterinarian to monitor liver function. Besides seeing your dog act with more vital energy, the blood test will give you an accurate evaluation of the product’s effectiveness.