I don't believe anyone's yet given Sam Patterson's 1925v lyrics. They're believed to be the first use of the modern tune and the first inclusion of MacDonald and E-I-E-I-O. I just transcribed the whole thing from the 1925 recording. It's not so innocent!

1
Old MacDonald had a farm, E-I-E-I-O.
And on his farm he had some chicks, E-I-E-I-O,
with a chick-chick here and a chick-chick there,
here a chick, there a chick, everywhere a chick-chick.
Old MacDonald had a farm, E-I-E-I-O.

2
Old MacDonald had a farm, E-I-E-I-O.
And on his farm he had some ducks, E-I-E-I-O,
with quack-quack here and a quack-quack there,
here a quack, there a quack, everywhere a quack-quack,
a chick-chick here, a chick-chick there,
here a chick, there a chick, everywhere a chick-chick.
Old MacDonald had a farm, E-I-E-I-O.

3
Old MacDonald had a farm, E-I-E-I-O.
And on his farm he had some turkeys, E-I-E-I-O,
with a gobble-gobble here and a gobble-gobble there,
here a gobble, there a gobble, everywhere a gobble-gobble,
quack-quack here, quack-quack there,
here a quack, there a quack, everywhere a quack-quack,
a chick-chick here, a chick-chick there,
here a chick, there a chick, everywhere a chick-chick.
Old MacDonald had a farm, E-I-E-I-O.

4
Old MacDonald had a farm, E-I-E-I-O
And on his farm he had some hogs, E-I-E-I-O,
with a honk-honk here and a honk-honk there,
here a honk, there a honk, everywhere a honk-honk,
gobble-gobble here, gobble-gobble there,
here a gobble, there a gobble, everywhere a gobble-gobble,
quack-quack here, quack-quack there,
here a quack, there a quack, everywhere a quack-quack,
a chick-chick here, a chick-chick there,
here a chick, there a chick, everywhere a chick-chick.
Old MacDonald had a farm, E-I-E-I-O.

5
Old MacDonald had a farm, E-I-E-I-O.
And on his farm he had a Ford, E-I-E-I-O,
with a rattle-rattle here and a rattle-rattle there,
here a rattle, there a rattle, everywhere a rattle-rattle,
honk-honk here, honk-honk there,
here a honk, there a honk, everywhere a honk-honk,
gobble-gobble here, gobble-gobble there,
here a gobble, there a gobble, everywhere a gobble-gobble,
quack-quack here, quack-quack there,
here a quack, there a quack, everywhere a quack-quack,
a chick-chick here, a chick-chick there,
here a chick, there a chick, everywhere a chick-chick.
Old MacDonald had a farm, E-I-E-I-O.

6
Old MacDonald had a farm, E-I-E-I-O.
And on his farm he had a still, E-I-E-I-O,
with a drip-drip here and a drip-drip there,
here a drip, there a drip, everywhere a drip-drip,
rattle-rattle here, rattle-rattle there,
here a rattle, there a rattle, everywhere a rattle-rattle,
honk-honk here, honk-honk there,
here a honk, there a honk, everywhere a honk-honk,
gobble-gobble here, gobble-gobble there,
here a gobble, there a gobble, everywhere a gobble-gobble,
quack-quack here, quack-quack there,
here a quack, there a quack, everywhere a quack-quack,
a chick-chick here, a chick-chick there,
here a chick, there a chick, everywhere a chick-chick.
Old MacDonald had a farm, E-I-E-I-O.

7
Old MacDonald had a farm, E-I-E-I-O.
And on his farm he had a wife, E-I-E-I-O,
with a gimme-gimme here and a gimme-gimme there,
here a gimme, there a gimme, everywhere a gimme-gimme,
drip-drip here, drip-drip there,
here a drip, there a drip, everywhere a drip-drip,
rattle-rattle here, rattle-rattle there,
here a rattle, there a rattle, everywhere a rattle-rattle,
honk-honk here, honk-honk there,
here a honk, there a honk, everywhere a honk-honk,
gobble-gobble here, gobble-gobble there,
here a gobble, there a gobble, everywhere a gobble-gobble,
quack-quack here, quack-quack there,
here a quack, there a quack, everywhere a quack-quack,
a chick-chick here, a chick-chick there,
here a chick, there a chick, everywhere a chick-chick.

Old MacDonald had a farm, E-I-E-I-O.