"Protective cartilage" refers to a durable and flexible tissue that covers the ends of bones in joints, acting as a cushion or shock absorber to prevent them from rubbing against each other and getting damaged. Full definition
While arthritis is most common in older dogs, caused by the natural erosion of protective cartilage over the years, there can be a number of other causes. (pethelpful.com)
Injury, stress, «wear and tear», and repetitive patterns repeatedly wear down the joints protective cartilage diminishing the synovial fluid and protective coverings leading to bone on bone. (vyanayoga.com)
The soft protective cartilage that lines it will slowly wear down as your furkid ages, and when that happens, it will become uncomfortable and painful. (petsmagazine.com.sg)