Veterans recommend glucosamine dosage for dogs with arthritis as it stimulates reproduction of cartilage and comes with several other nutrients that contribute to the general health of a dog. Besides stimulating reproduction of arthritis and thus treating arthritis, glucosamine is readily absorbed into the dog’s blood system where it releases other minerals that help dogs recover faster from diseases and maintain a good health. Glucosamine has been used for years as a treatment of arthritis and there hasn’t been found any other treatment to overdo it. However, researches and experiences have linked glucosamine to serious side effects during its use for treatment of arthritis. Basically, glucosamine is made from shells of sea crustaceans such as crabs and lobsters which why it causes side effects to dogs that are allergic to sea food. Serious side effects that an animal may experience include diarrhea, vomiting, gas, skin inflammation and itching. In case of such side effects, you are advised to change your means of medicating your dog by only including the medication in food.