Which one doesn't belong?

Hi Puppers, mom decided to try her creatvie side.....and this was the result. For all the time she spends chasing us around with the camera, we were hoping her skills had improved. Well, what's a dog to do? She is apparently unable to capture our true beauty, but we'll let her keep trying. Perhaps in the future she'll take more becoming photos. Oh, by the way, we don't know who the first guy is. She threw that in there, just to add insult to injury.