Chronic degenerative joint disease of the canine hip is commonly treated with total hip arthroplasty. The outcome of surgery is generally excellent and good pain-management and mobility is achieved. The modular total hip system consists of three parts. The cup is implanted in the acetabular area, and the combination of the head and the stem into the proximal femoral medullary canal. The implants are attached either with polymethylmethacrylate bone cement, or without cement in the so-called uncemented system. Both systems have advantages and disadvantages. This paper describes treatment of canine chronic degenerative joint disease of the hips with uncemented and cemented total hip arthroplasty.