"If slaughterhouses had glass walls, everyone would be a vegetarian," says Paul McCartney. As it is, few are aware of where their food is actually sourced from, or the fact that store-bought meat products were actually once living, breathing, feeling animals.

An installation by street artist Banksy, however, likely did much to change that. The notable project, aptly titled "Sirens Of The Lambs," made its debut in New York in 2013, but is as relevant as ever.

As you can view above, the slaughterhouse delivery truck carried stuffed animals (or puppets), including cows, chickens, pigs, and lambs, which could be seen moving their heads through wooden slats.