I do not kiss my chickens because I seen fighting over a mouses foot and can only assume they ate the rest of the mouse... then I seen them picking corn out of cow poop... I just have to wonder what have they done that I havent seen.. so its really not hard to keep from kissing them after all that..
I think that about dogs - the 'tale' about their mouths being cleaner than a human's. All I can think of when I see someone getting licked all in the mouth by a dog is that dogs don't use toilet paper....