Meanwhile—if your cat doesn’t much like being held and restrained—get your cat used to the handling you’ll have to do to put on his harness. (Just skip this step if your cat already accepts or enjoys being held.) With his favorite snack or toy close by, hold him firmly but gently for a few seconds. Softly praise him while you hold him, then show him a treat and release him to eat it. Repeat this exercise often for several days, always following your handling with treats, and gradually holding him a few seconds longer each time. Practice gently handling your cat’s legs and feet, too, and rewarding him for accepting that.