Oz and Darlin alwaysh ave their collars on except for baths, or sometimes I take them off at nights.
Ozzy only puts his harness and/or leash on when we go in the car for a ride, or go somewhere. Darlin won't tolorate her harness, so she gets a collar and leash.
Ozzy wears his collar and leash at the same time. Their harnesses are barley ever left on in the house.