The best pet cod liver oil depends on your pet’s species, the amount you need, and whether you want a dog-specific or dog-and-cat formula. Nordic Naturals offers dog-focused 8-ounce and 16-ounce bottles, while CountryPet Naturals lists Icelandic cod liver oil for dogs and cats. Chew + Heal Labs is another 16-ounce dog option. Compare the stated omega-3 content and listed ingredients, and ask your veterinarian about a suitable dose—especially for products containing vitamins A and D.
| Product | Best For | Stated Distinction |
|---|---|---|
| Nordic Naturals, 8 oz | Medium to large dogs | Dog-specific liquid with EPA and DHA |
| Nordic Naturals, 16 oz | Large dogs or multi-dog homes | Larger bottle; triglyceride-form omega-3s |
| CountryPet Naturals, 8 oz | Dogs and cats | Single-ingredient; 1,150 mg omega-3s per teaspoon |
| CountryPet Naturals, 8 oz | Pets whose owners want listed EPA and DHA details | Includes naturally occurring vitamins A and D |
| Chew + Heal Labs, 16 oz | Dogs needing a larger liquid bottle | Lists no additives or preservatives |
Nordic Naturals Cod Liver Oil, 8 oz
This dog-specific liquid is the smaller of the two Nordic Naturals sizes. The manufacturer describes it as formulated for medium to large dogs and made from fresh, wild Arctic cod. It lists EPA and DHA to support skin and coat, brain, eye, and immune health.
Best for: Owners of medium or large dogs who want a pet-formulated cod liver oil in an 8-ounce bottle. The oil is stated to be in triglyceride form, which the listing identifies as the form naturally found in fish.
Consideration: The listed formulation is for dogs. The product information says to use pet products rather than the brand’s human products for dogs or cats.
Nordic Naturals Cod Liver Oil, 16 oz
This larger bottle is described as suitable for large to very large dogs and multi-dog households. Like the 8-ounce version, it uses wild Arctic cod and provides EPA and DHA. Its omega-3s are stated to be in triglyceride molecular form.
Best for: Owners who prefer the listed larger size for a large dog or more than one dog. Choose it over the smaller bottle when the bottle size better suits your household’s planned use.
Consideration: The product listing describes this formula for dogs; it does not provide a cat-specific formulation in the supplied details. Follow veterinary guidance for serving amounts.
CountryPet Naturals Icelandic Cod Liver Oil
CountryPet Naturals describes this 8-ounce oil as a single-ingredient, preservative-free product made from wild-caught Icelandic cod. The listing states 1,150 mg of omega-3s per teaspoon and identifies EPA, DHA, and natural vitamins A and D. It is presented for both dogs and cats.
Best for: Owners looking for a listed dog-and-cat option with a stated omega-3 amount per teaspoon. It may also suit buyers prioritizing a single-ingredient description.
Consideration: Vitamins A and D are part of the listed composition. Ask a veterinarian how this product fits your pet’s diet and appropriate serving size.
CountryPet Naturals Pure Cod Liver Oil
This CountryPet Naturals listing also describes a single-ingredient Icelandic cod liver oil for dogs and cats. It states 1,150 mg omega-3s per teaspoon and mentions EPA, DHA, and natural vitamins A and D. The listing specifically connects EPA with skin discomfort and DHA with brain, eye, and nervous-system support.
Best for: Buyers who want the listed EPA and DHA details alongside the stated omega-3 amount. Its dog-and-cat positioning offers a different species range from the dog-specific Nordic Naturals options.
Consideration: The product contains naturally occurring vitamins A and D according to the listing, so confirm with a veterinarian before adding it to a pet’s routine.
Chew + Heal Labs Pure Cod Liver Oil
This 16-ounce liquid is described as pure cod liver oil for dogs, with omega fatty acids for skin and coat support. The listing also mentions vitamins A and D and says the oil has no additives or preservatives. It is presented for dogs of all ages and sizes.
Best for: Dog owners who want a larger bottle and a listing that clearly states no additives or preservatives. The product description also highlights skin, coat, and mobility support.
Consideration: The supplied product details do not state a specific omega-3 amount per serving. Compare the label and ask your veterinarian about dosing before choosing it.
Buying Guide: How To Choose Pet Cod Liver Oil
Is the formula intended for your pet?
Check whether the product is listed for dogs, cats, or both. The Nordic Naturals options here are described as dog products. The two CountryPet Naturals listings are presented for dogs and cats, while the Chew + Heal Labs listing is for dogs. Do not assume a human supplement is interchangeable with a pet formula.
How much omega-3 does the label state?
Compare amounts only when the serving units match. The CountryPet listings state 1,150 mg of omega-3s per teaspoon. The Nordic Naturals listings name EPA and DHA and provide an omega-3 amount in the product name, but the supplied details do not give a per-teaspoon serving figure. Check the product label for serving-specific information.
Should vitamins A and D affect your choice?
Several listings identify vitamins A and D as part of the cod liver oil. Tell your veterinarian about your pet’s diet and other supplements before adding another source. A professional can help determine whether the product and amount are appropriate for your individual pet.
Which bottle size makes sense?
The listed options include 8-ounce and 16-ounce bottles. Consider the amount your veterinarian recommends, how many pets will use the product, and how quickly your household expects to use it. A larger bottle is not automatically the better fit if it exceeds your planned use.
Frequently Asked Questions
Can cats use every product listed here?
No. The CountryPet Naturals listings are described for dogs and cats. The Nordic Naturals and Chew + Heal Labs listings are described as dog products.
What are EPA and DHA?
EPA and DHA are omega-3 fatty acids identified in several product listings. The listed uses include support for skin and coat, and, for some products, brain and eye health.
How much cod liver oil should I give my pet?
The appropriate amount depends on the pet and the specific product. Ask your veterinarian and follow the product label rather than estimating a dose.
Does cod liver oil contain vitamins?
Some products in this comparison list natural vitamins A and D. Check the specific product label because formulations and stated details differ.