In dogs, osteoarthritis occurs when the protective cartilage cushioning the joints gradually wears away, resulting in bones rubbing against each other. This condition is often seen in older dogs but can also affect younger dogs due to factors like genetic predisposition, previous injuries, or obesity. The cartilage loss causes inflammation, pain, and stiffness, making it difficult for a dog to engage in everyday activities such as walking, playing, or climbing stairs. As dogs age, the risk of developing osteoarthritis increases significantly, which can impact their overall quality of life. Symptoms may include limping, reluctance to exercise, and changes in behavior such as increased irritability. Understanding this condition is crucial for dog owners, as early intervention and management strategies can help maintain mobility and comfort in their pets. Treatments may include weight management, physical therapy, and medications that target inflammation and pain, contributing to a longer, healthier life for aging dogs.