OK, so here's the more-or-less "common version"*, which I found in Silber & Silber's Folksinger's Wordbook

Old MacDonald Had A Farm

  F               Bb    F
  Old MacDonald had a farm,
  G      C       F
  E - I, E - I, Oh!
  
                      Bb       F
  And on this farm he had some chicks,
  G7     C7      F
  E - I, E - I, Oh!
  
  With a chick chick here
  
  And a chick chick there,
  Bb
  Here a chick, there a chick,
  F             Gm
  Everywhere a chick chick,
  F               Bb    F
  Old MacDonald had a farm,
  G7     C7      F
  E - I, E - I, Oh!
  
  Ducks—quack, quack
  
  Dogs—bow, wow
  
  Cows—moo, moo
  
  Pigs—oink, oink.
  
  Etc.

*I suppose, if I were totally honest, "common version" means what I've known since I've known since I was a kid in Detroit, seat of all American culture and tradition (and home of Motown Records)
-Joe Offer-