I'm disgusted that people still bash the genre with such gross "hick" stereotypes.
Then the genre should stop reinforcing them.
I think "Hillbilly Bone" goes the other way, since it says that you
don't have to follow any of the Southern stereotypes to like country music.
Granted, there are a buttload of "I'm country because I x, y and Z", and maybe trucks and/or dogs are sometimes the Z. Perhaps that's where my argument came apart — I didn't make it clear enough that I was trying to say "there are very few country songs
explicitly and non-ironically about dogs and/or trucks". I'll grant that Modor's list does have a few I'd never heard of since they're not mainstream, but on the other hand, at least a couple of those sound like they were done tongue-in-cheek (particularly Rodney Carrington — "I'm getting married to my pickup truck"). Also, some of them aren't truly "truck songs": "Redneck Woman" is basically an "I'm country because I x, y, z" song, "What Was I Thinkin'" is about running away with a girl, "That Ain't My Truck" is about seeing his girl with some other guy, and "Passenger Seat" doesn't specify the vehicle.
Also, "Jeep Jeep" and "Rockin' the Beer Gut" weren't even close to hits, so they're probably not the best representation here. I still consider the latter a guilty pleasure.