It's well known that PETA is not afraid to make you feel uncomfortable while pushing their meat eater-hating agenda, but London buses refused to put up with a graphic ad that showed a roasted dog head being served on a silver platter.

In the controversial bus ad, PETA made the classic vegan argument that said, "If you wouldn't eat your dog, why would you eat a turkey?" which is probably the ridiculous equivalent of, "You wouldn't eat a poinsettia, why would you eat lettuce?"

On its latest Instagram post, PETA UK said:

One hundred buses were meant to be serving up some food for thought from PETA this Christmas, but at the last minute, London Buses refused to run our advert on the grounds that it may cause offence.

What’s truly offensive isn’t the ad but killing millions of turkeys for Christmas dinner – who have the same capacity to feel pain as dogs and cats.

The bus company, Transport for London, had a legit reason for nixing the ad, though. According to Mashable, UK advertising standards prevent marketers from using shock tactics and fear to promote something. Shock value is PETA's forte, so it's a surprise they get any ads up in the UK, at all.

While the ads didn't run on the buses, attention was brought to the photo, so PETA got the attention they wanted, anyway. Congrats.