hmm, all the songs on animals are after animals. song list:
2. pigs (3 different ones) or something
3. pigs on the wing (pt 1)
4. pigs on the wing (pt 2)
maybe it has something to do with the pigs on wing (plane wing) and the boars on the island.
though, i just read the animals link and the former names of dogs and sheep were "you gotta be crazy" for dogs, and "raving and drooling" for sheep. maybe this has to do with charlie for everyone thinks hes going crazy and heroin has something to do with raving and drooling.