Owners can give doges 500 milligrams of glucosamine for every 25 pounds of body weight, states Dogs Naturally. It is unlikely for a dog to overdose on glucosamine.
Glucosamine is a natural treatment to help dogs with arthritis. It helps the dog's body build collagen and maintain the fluid necessary to lubricate the joints, states Dogs Naturally. Other natural supplements, including vitamins C and E, fish oil and chondroitin, also help dogs with arthritis, according to Earth Clinic. Pain killers and anti-inflammatory medication may also help the condition. The American Society for the Prevention of Cruelty to Animals advises dog owners not to begin giving their dog medications or supplements until they first consult a veterinarian.