What are the early symptoms of CHD in dogs? The symptoms of dogs suffering from CHD in the early stages are reluctance to exercise, difficulty standing up after lying down, and a shaky gait. CHD is a common hereditary developmental orthopedic disease. As puppies grow, the bony part of the hip joint develops inconsistently with the soft tissue that supports it, resulting in CHD.

1. Likes to sit and lie down, but hates to stand; unwilling to exercise, especially up and down stairs, steps and sofas; it seems laborious to stand up from a sitting or lying position.

2. When lying down, the hind limbs touch the ground and stretch backward. When sitting, the hind limbs are tilted to one side.

3. When standing, the center of gravity shifts to one side to varying degrees, and when walking, the hips twist violently from left to right.

4. Lameness, the landing point of the front and rear limbs is asymmetrical to the center of the body axis, and both hind limbs land almost simultaneously when running, showing a bunny hop.

5. Pain during exercise examination, the hip joint is abnormally sensitive to palpation, exercise requires warm-up, the range of motion is reduced, and symptoms worsen after resting from strenuous exercise.

Canine hip dysplasia, referred to as CHD, is a common hereditary developmental orthopedic disease. Dogs with joint dysplasia have normal joints at birth. As puppies grow, the bony part of the hip joint develops inconsistently with the soft tissue it supports, resulting in CHD.

This disease generally occurs before 6 months of age. During this period, the joint tissue has a certain degree of softness and plasticity within a certain elastic range. CHD is a hereditary disease that is common in Rottweilers, German Shepherds, Labrador Retrievers, Golden Retrievers, Saint Bernards, and Bernese Mountain Dogs. It can also occur in dogs such as Shetland dogs and Huskies but is rare.

When puppies are born, the femoral head and acetabulum of the hip joint are mainly cartilage. Bone formation and changes in the position of the femoral head relative to the femoral shaft are completed by endochondral ossification and osteoclast activity respectively. When CHD occurs, joint laxity will lead to hip joint incoordination. This incoordination is most severe on the dorsal medial surface of the femoral head and acetabular labrum. The dorsal medial surface of the femoral head and acetabular labrum support almost half of the dog's walking ability. weight. This results in microfracture and deformation of the acetabular labrum, cartilage wear, and subchondral bone deformation. Joint effusion, stretching and thickening of the joint capsule and round ligament, and osteophyte formation also occur.