My Dog is a whippet x staffie just 2+1/2 years old ,and keeps injuring her left shoulder ,so took her to the vets.Vets said to have her in and x ray her and see what's wrong .found out she has server arthritis in her elbow and shoulder .she has to have a jab now for 4 weeks and tabs for 6 weeks .the worst part is she can never play with other dogs again which she loves . that really breaks my heart as she is such an active dog and loves walking with me in the woods and running around ,playing with other dogs