Our blueberries hearts are not only filled with great minerals, and antioxidants from the blueberries but also a great source of omega-3 fatty acids, protein, vitamin D, vitamin B12, calcium, selenium, and coenzyme Q10 from our water-submerged sardines. another ingredient that is included in our blueberry hearts is carrots a lot may not know about all the health benefits that carrots actually provide for your dog, such as eye health thanks to the beta-carotene that a dog's body converts to vitamin A. Carrots are great for the immune system and also good for healthy skin and coat.