Sardines for Dogs: The Omega-3 Powerhouse Hiding in Plain Sight
Sardines are underrated in the dog nutrition space. They're one of the richest sources of EPA and DHA available, they have among the lowest mercury levels of any fish, and they're inexpensive. Here's why they deserve a regular place in your dog's diet.
Omega-3 Content
A single 100g serving of Atlantic sardines contains approximately 1.48g of EPA and 0.74g of DHA, for a combined 2.22g EPA+DHA. Compare to salmon (1.0-1.8g per 100g) or tuna (0.2-0.5g per 100g for canned light tuna). Sardines are at the top tier for marine omega-3 concentration among commonly available fish.
The therapeutic dose of EPA+DHA for a 50lb dog is approximately 1,000-2,750mg daily. Two sardines (approximately 60g each) provides 1,300-1,500mg EPA+DHA, meeting the lower therapeutic range in a whole-food form.
The Mercury Advantage
Larger, longer-lived predatory fish (tuna, swordfish, shark) accumulate mercury through the food chain (bioaccumulation). Sardines are small, short-lived, and feed low on the food chain. The FDA's mercury monitoring data consistently shows sardines among the lowest mercury concentrations of any commercial fish: approximately 0.013 ppm versus tuna's 0.144-0.340 ppm. Sardines can be fed more frequently than large predatory fish without mercury accumulation concerns.
How to Serve
Canned in water (not oil, not sauce, not salt): the most convenient form. Drain the water. One sardine as a treat, or one to three sardines mixed into the meal depending on the dog's size.
Fresh: broiled or baked without seasoning, remove any large bones. Fresh sardines are nutritionally superior to canned but harder to source and prepare.
Freeze-dried: our freeze-dried range includes fish-based options that deliver the omega-3 and protein benefits in a convenient format without the canned fish smell situation.
Frequency Guidelines
2-3 times per week for a small dog. Daily for medium to large dogs as a component of their diet or as a supplement to a lower-omega-3 base food. Monitor stool consistency when adding sardines: the fat content can cause loose stools in some dogs if the quantity is too high initially. Browse our full supplement collection for omega-3 options for dogs who don't tolerate whole fish.