Both my guys are always in their Julius K9 Harness if we leave the house. It's nice to have that added handle on the back and the big ring for the leashes. I have nice leather collars for both of them, and they look very handsome, but the harnesses are just as easy to put on, and work better for managing two at once.
depends for us I like the harness if we are walk about in town or in the truck I have more control not that they need much there good walkers , at the property they will all have there collars back on and there ID tags , in the house I take them off most times it is easier to get to there tickle spots
Yes, because I am paranoid! I am scared Monty will somehow escape and he is not the sharpest knife in the drawer so would just wander off. He is micro-chipped but his collar has his tags on. We use his harness for walks.