Izzy wears her harness all day, except for at night time when she is sleeping. It's just too hard to get her in and out of her harness, especially since she's still a puppy and time is of the essence when getting her outside to go potty! Izzy doesn't seem to be bothered by the harness, and we plan on getting her a really nice one once she stops growing.
Ours only wear their harness when going bye-bye (car ride, walk, etc.) but they are nekkid at home. There was a time that Nilla wore hers more often so I could easily grab her when she was being a trouble-maker, but it's been quite a while since the harness was needed for that purpose.
Mom to Miss Jelly Bean "Beanie" Licorice Pug
Forever in our hearts: Miss Nilla Sassafras Pug August 17, 2002 to April 19, 2018
And my Heart-Dog... Wonka the Dancing Pug, CGC, W-FD, W-TFD.
Februrary 11, 2005 to May 10, 2020. Miss you, sweet boy!