While making this crucial decision for your dog, they have a quiz/questionnaire that helps you choose a product. You can also contact them by phone to assist you in deciding which product is best suited for your pet. Usually, soft gels are recommended for pets who dislike the taste or odor of oil, have a sensitive stomach, or who dislike chews, or have food allergies. Oil is excellent for dogs under 5 pounds because the drug may help adjust their size.