Roald Dahl's "The Three Little Pigs"
I think my favorite variant for now is that of Roald Dahl, from his 1982 Revolting Rhymes. You can find a version of it here. It begins with this lovely stanza:
The animal I really dig,Dahl's 1959 poem "The Pig" is also quite worth scrutiny. You can find a version of it here on the interweb, but it also appears in Kiss Kiss (1960).
Above all others is the pig.
Pigs are noble. Pigs are clever,
Pigs are courteous. However,
Now and then, to break this rule,
One meets a pig who is a fool.