In dogs, osteoarthritis causes chronic pain accentuated by heightened sensitization in the nervous system. Unlike arthritis, which affects immobile animals, osteoarthritis triggers only physical pain when the dog moves. The limbs become stiffer, causing the dog to move much more stiffly. These effects and symptoms will mostly occur in the morning when the muscles have not yet been used. As with humans, CBD extracted from hemp and without THC helps relieve pain in animals.