Ours hated collars and harnesses until they learned to associate the harness with the big treat of being outdoors. Mini and Jasmine took a few attempts and adjusted fairly quickly, Tabasco took to the harness in the first minute and now knows that having two hoomans at home means OUTDOORS! Pickles is our special boy who doesn't believe in any adornment on his creamy body, so he's taking a lot longer ...