Heres a starter..
1.The opening part of…“Several Species of Small Furry Animals Gathered Together in a Cave and Grooving With a Pict” … Pink Floyd-Ummagumma!
2.“Meat is Murder”… The Smiths-Bigmouth strikes again!
3.“Good morning good morning”…The Beatles-Sgt Peppers!
Only one I can think of is “Werwolves of London” and the Super Chicken theme song.
The first person to mention Old McDonalds Farm should hang their head in shame for sheer lack of imagination.
Slan,
D.
doh!
(just remembered 2 more note above edit!).
I guess that would be me. Other than fiddles or banjos imitating animal noises, I know of no songs that do that.
Ye missed the small print in my post… 
Slan,
D.
Piggies (by the Beatles)
I vaguely remember hearing pigs snorting in that recording, but I can’t recall whether it was real pigs or humans-making-piggy-sounds.
Have you seen the little piggies
Crawling in the dirt
And for all the little piggies
Life is getting worse
Always having dirt to play around in.
Have you seen the bigger piggies
In their starched white shirts
You will find the bigger piggies
Stirring up the dirt
Always have clean shirts to play around in.
In their styes with all their backing
They don’t care what goes on around
In their eyes there’s something lacking
What they need’s a damn good whacking.
Everywhere there’s lots of piggies
Living piggy lives
You can see them out for dinner
With their piggy wives
Clutching forks and knives to eat their bacon.
Most any song on Pink Floyd’s Animals would qualify.
On Steve Vai’s Passion and Warfare album he included the sound of a cat being “relieved” with a thermometer.
Well, go for Kate Bush’s absolutely amazing new CD “Aerial” - lots of “talking birds” on it. (What a good occasion to beat the drum for this beautiful new masterpiece! 
)
Claus
Lunasa, Goodbye Miss Goodavich. I swear it has pig noises in it.
Nah,
That’s the flute player breathing.
Slan,
D. 
snark as a new articulation technique? 
Yeah,why not.Like having a built in boom box.
Eliminates the need, and I use that word lightly, for a bodhran player.
Slan,
D. 
the beginning of “Hush” by Deep Purple.
“Hey Bulldog” by the Beatles on Yellow Submarine album
“Uncle Albert/Admiral Halsey” by Paul McCartney
What about “Blackbird” by the Beatles?
Bungle in the Jungle - Jethro Tull.
Darn! You guys got all of mine. Hey, wait a minute. How 'bout:
I had a little rooster went cock-a-doodle-doo
Dee-doodle-dee-doodle-dee-doodle-dee-doo etc.
djm