If hip issues aren’t severe, the nonsurgical options for treating them include:

Weight optimization to decrease stress on joints and lessen the inflammation associated with excess body fat
Medications, including NSAIDs, to reduce pain and inflammation
Modifying exercise to maintain activity and movement but not cause severe pain
Joint supplements and injections to help slow the progression of osteoarthritis and improve joint lubrication
Rehabilitation therapy to improve joint movement and flexibility, and limb function
Acupuncture may be helpful for decreasing pain

If your pet is a candidate for surgery, below are three common treatments that may be offered:

Double or triple pelvic osteotomy (DPO/TPO): In this procedure, the surgeon cuts the pelvic bone in two (DPO) or three (TPO) places and rotates the hip socket section to cover the top of the femur better. This decreases the joint laxity (looseness). These procedures are performed only in young dogs, usually less than 9–10 months of age, and in dogs with no evidence of hip arthritis.
Femoral head ostectomy (FHO): The idea behind this procedure is to remove bone-to-bone contact across the hip joint in hopes of decreasing pain. The top portion of the femur (femoral head) is removed. The ball-and- socket hip joint becomes a muscular joint. The FHO is referred to as a salvage procedure, reserved for when other treatments or surgical options aren’t possible.
Total hip replacement (THR): THR is considered the most effective surgical treatment for hip dysplasia, osteoarthritis, and other conditions that affect the hip joint. Specially designed implants replace the damaged or arthritic joint, enabling your pet to return to a pain-free and active lifestyle.

A comparison chart of these treatment options can also be found here.