Billy Jones & Ernest Hare (The Happiness Boys), sing a shortened version of this, with a few new lines and some patter between the verses.

From the sheet music at Indiana University:


OH, YOU CAN'T FOOL AN OLD HOSS FLY
Words & music by Blanche Franklyn. Nat Vincent, and Harry Von Tilzer.
New York: H. Von Tilzer Music Pub. Co., ©1924.

1. April fool we all learned at school. It comes but once a year.
Most ev'ry one has a lot of fun each time that day draws near.
Now, you can fool some folks sometimes, once Lincoln he did say,
But I will ne'er forget the words that I heard my old dad say:

CHORUS: Oh, you can't fool an old hoss fly.
Oh, you can't fool an old hoss fly.
Now, you won't find feathers on a bulldog's legs.
A hen won't lay you hard-boiled eggs.
It snows but never in July.
Oh, you can't fool an old hoss fly.

2. Adam Howe had a Jersey cow who had a little calf.
He named the calf Elizabeth, which made the neighbors laugh.
He asked the folks what made 'em grin. Their answer was a wow:
"You named that calf Elizabeth but it ain't that kind a cow."

CHORUS: Oh, you can't fool an old hoss fly.
Oh, you can't fool an old hoss fly.
Now, you won't call rye-bread choc'late cake.
You can't get milk from a cow named Jake.
A Turkish bath's an alibi,
But you can't fool an old hoss fly.

EXTRA VERSES AND CHORUSES:

3. Flossie Green the village queen in autos liked to roam;
Had a mishap for a city chap, made Flossie walk back home.
She got home late; her dad got sore, and said, "Here's what to do:
Next time you go in an auto, Flo, take roller skates with you."

CHORUS: Oh, you can't fool an old hoss fly.
Oh, you can't fool an old hoss fly.
Now, a bee won't hurt you when he's buzzin' around,
But glory hallelujah when the bee sets down!
He'll sting you where the clouds roll by.
Oh, you can't fool an old hoss fly.

4. Farmer Brown came to New York town to see the Gay White Way.
He took a stroll and his bankroll passed out in just one day.
When he got home, a friend said, "Gee, I'll be you bought Grant's Tomb."
He said, "Not me. I fooled 'em, see. I bought the Hippy-Drome."

CHORUS: Oh, you can't fool an old hoss fly.
Oh, you can't fool an old hoss fly.
Now, a mouse ran up an elephant's trunk,
But he's too wise to fool with a skunk.
Crabapples won't make pumpkin pie.
Oh, you can't fool an old hoss fly.

5. A suffragette made a little bet that in this land of free,
A woman nowadays could be what any man could be.
A young man in the crowd spoke up; his answer made her wild.
Said he, "I'd like to see you be the father of a child."

CHORUS: Oh, you can't fool an old hoss fly.
Oh, you can't fool an old hoss fly.
A dog sat on the trolley track.
A car hit him an awful smack.
We'll have hot doggies by and by.
Oh, you can't fool an old hoss fly.

6. Abie Fein said to Finklestein, "I passed your house today.
I saw you hug and kiss your wife. You sure can love, I'll say!"
Said Finklestein to Abie Fein: "Such funny words you speak!
I'll tell you true, the joke's on you; I ain't been home for a week!"

CHORUS: Oh, you can't fool an old hoss fly.
Oh, you can't fool an old hoss fly.
Now, Finklestein said, "Listen to me.
If you saw your wife on Goldberg's knee—."
Said Abe, "I'd sell the darn settee!"
Oh, you can't fool an old hoss fly

7. Humpty Dumpty took a fall from off the wall, great Scott!
He raised a great big bumpty on his goodness-knowsy-what.
You know the reason why he fell? I'll tell you pretty quick:
His wifie caught him flirtin' and she soaked him with a brick.

CHORUS: Oh, you can't fool an old hoss fly.
Oh, you can't fool an old hoss fly.
Now, Jack and Jill went up the hill.
They went for water but they found a still,
And that's why they came tumbling down.
Oh, you can't fool an old hoss fly.

8. Doctor Small he used to call on sick folks every day.
He fell in love with a Mrs. Dove, a married woman gay.
One night he fell into a well; we heard him loudly groan.
He should have tended to the sick and let the well alone.

CHORUS: Oh, you can't fool an old hoss fly.
Oh, you can't fool an old hoss fly.
Young Johnny Jones marries Sally Meek.
They plan a home, just so to speak:
A dollar down and a sheriff a week.
Oh, you can't fool an old hoss fly.

9. Mary had a little lamb, which made the fellows laugh.
They made her sore because they yelled, "Oh, look at Mary's calf!"
She got so mad she got a gun and shot her lambie dead,
And now she takes her lamb to school between two hunks of bread.

CHORUS: Oh, you can't fool an old hoss fly.
Oh, you can't fool an old hoss fly.
George Washington would never tell a lie.
He chopped down the cherry tree but didn't say why.
His favorite fruit was cherry pie.
Oh, you can't fool an old hoss fly.

10. Now, Percy Hare wed Peggy Clare; they fell in love at sight.
Their honeymoon they started soon and on their bridal night,
Her teeth came out; her hair came off; poor Percy said, "Oh, gee!"
When Peg took off her wooden leg, he yelled, "I married a tree!"

CHORUS: Oh, you can't fool an old hoss fly.
Oh, you can't fool an old hoss fly.
A camel goes dry for a week, I vow,
But who the H—— wants to be a camel now?
Bootleggers say we still get rye.
Oh, you can't fool an old hoss fly.