I've seen this posted all over the place, and it really bothers me. Forget for a moment the inherent danger of placing things like a glass vase on an animal's head- even without *those* photos, this strikes me as just degrading. The dog doesn't necessarily comprehend the degradation any more than they get that we find it funny when they "shake hands" or "play dead". But this is basically just the owner doing whatever they want to their dog, because they can. It's taking advantage of that poor dog's loyalty just for your own amusement. That's a member of your family, maybe treat them with as much dignity as you would your own child.

I remember this same sort of thing, a few years ago, with a site called "Lost in Translation"- it does it via several different languages in Babelfish. I used to play a game with folks on some boards, posting the lost-in-translation of a song lyric, which they'd in turn decipher back to the original lyric.

http://tashian.com/multibabel is the site.