Yes, younger pets can indeed develop arthritis, although it is more commonly observed in older dogs. Arthritis in younger dogs can be attributed to a variety of factors such as congenital joint deformities, injuries, or obesity, which stress the joints and contribute to the early onset of arthritis. Additionally, certain breeds are predisposed to joint issues, which can manifest at a young age. If a young pet displays symptoms like limping, stiffness, or reduced activity, it is advisable to consult a veterinarian for an assessment and appropriate management.