both our dogs took about 2 seconds from walking into the room with the needle to walking back out. jonny just looked at the vet, hansel yelped quickly and on our way we went. i cannot imagine putting them out for THAT. but neither one dislikes going either. they both look at it as an AMAZING chance to smell, jump, chase, visit, investigate,… well you get the idea. they love it there. SO MANY dog food bags to smell. lol