Quote from Cliff in The Spy Who Came In for a Cold One
Cliff: All right, here's a little-known fact. The smartest animal...
Cliff: ...is the pig.
Norm: What? They look pretty stupid.
Cliff: Yeah, your average oinker. Yeah, yeah, yeah. Scientists say if a pig had thumbs and a language, he could be trained to do manual labor.
Norm: You mean they'd be part of the workforce?
Cliff: Yeah, yeah. They'd give you 30 years of loyal service, then at the retirement dinner, you could eat 'em.