When first showing your cat the harness, allow him to sniff and play with it before attempting to put it on. While spending time with or in the harness, give him plenty of treats and wet food to reinforce positive associations. If your cat seems disinterested or uncomfortable in the harness, Woodard suggests trying different strap thicknesses, or giving it a spritz of stress relief spray to make it more appealing.
Once you buckle the harness, allow your cat to move around the house freely and get comfortable. When sizing your cat, make sure the harness is snug, but not too tight, Woodard says. Observe your cat as he moves around in the house, checking that he’s not wiggling out. “When you’re practicing in your home, it is really important to check for safety before ever going outside,” Woodard adds.