I couldn't do that. They would probably wonder what they had done wrong.
I guess a lot of the local small rescue groups bring in the dogs (and cats?) and use it. I think it would depend on the dog or cat. She said some cats just sit there the whole time, but there is the stop button. I just can't believe they could fit anything over 100# in it, I will have to look better next time I go there, which will probably be awhile.
