Source

• Glucosamine is obtained through the the chemical treatment of the chitin in crustacean shells, and chondroitin is derived from the cartilage of the cows, whales or sharks. The source of the chondroitin is listed on the ingredient label, so ecologically-minded consumers can avoid supplements made from sharks or whales. The cow cartilage is a byproduct of meat processing.
  
  

Uses

• Because it helps stimulate the production of cartilage and neutralize destructive cells, the treatment of arthritis and hip dysplasia are the two most popular uses for glucosamine chondroitin. It has also been used with anecdotal success to help heal wounds and stomach conditions.
  
  

Side Effects

• Glucosamine chondroitin is considered safe, and has been used in Europe for decades without any serious side effects. In rare instances, dogs may vomit or have diarrhea, but this can be avoided by administering the smallest effective dose, and giving it with food. Glucosamine chondroitin is safe enough for a dog to take daily for life.