I see this sign every time I am in Oregon as my father lives nearby. This picture is several years old, the sign has since decayed to near illegibility. Perhaps old Boss Hawg met an unfortunate end 'n' ended up part of a HawgBurger.
There was a great blog which ran from 2006 to 2011 called Suicide Food, which cataloged many examples of this, which the Wikipedia page defines as:
Suicide food is a visual marketing technique that involves presenting animals as if they wish to be eaten by humans or want to be directly involved with producing food products made for human consumption.
I started seeing examples of this and collected many over the years, but the blog ended in 2011. I have been looking for a friendly place to post these so we can all be collectively horrified.