According to the ASPCA, glucosamine supplements are safe for dogs and are often added to food formulas along with vitamin E and omega-3 fatty acids. Some veterinarians feel that glucosamine is especially beneficial for ailments common in senior dogs.
The Whole Dog Journal recommends giving glucosamine to dogs to prevent injury and canine osteoarthritis. Competitive dog owners who seek the best remedies for agile dogs rely on the nutritional supplement to prevent joint and bone degeneration. Glucosamine is effective when given to dogs in liquid, powder, capsule and injection form. Dr. Chris Bessent, a veterinarian specializing in natural treatment methods for performance dogs and horses, recommends giving glucosamine to athletic dogs when they are young to prevent osteoarthritis from occurring in later years.