(Strip Number 442, Original Publication Date, 18 July 1983)
Panel 1: As Danny slops the hogs, Mike says that they sure are big ones.
Panel 2: He then asks his uncle why he doesn't give them all names.
Panel 3: Dan tells him that that would make them too much like pets.
Panel 4: Since Beardo the Weirdo's back is turned, he doesn't see that his off-hand remark about not wanting to eat something he's had a personal relationship with has broken his nephew's brain.
Summary: The 'joke', as I see it, is "Hurr-durr-hurr!! Little kids don't know where their meals come from! HURR-DURR-HURR!!!"