Skin and Coat. Coconut oil can be very beneficial for pets when taken internally. Adding the oil to their food is the simplest way to include it in their diet. Just a few drops a day can be very beneficial to the coat, moisturizing the skin and hair. Coconut oil can be used in its semi-solid form or warmed slightly to make it liquid. For dogs and cats, add 1/4 teaspoon of oil for every 10 pounds they weigh. Slowly increase to 1 teaspoon for every 10 pounds of weight per day, or 1 Tablespoon for every 30 pounds.