Here is the Chihuahua (wee dog) song
As you can see it was written by Eric Bogle. From the Green Fields of France to the ridiculous.

Little Gomez
Eric Bogle
Once I had a doggie and I called him little Gomez,
For you see he was a Mexican chihuahua.
He wasn't very big, but what there was was all cojones
He really was a randy little fellah.
Big ones, small ones, were all the same to him
The canine equivalent of Errol Flynn.
At the drop of a sombrero he'd jump up and get stuck in.
Taking Gomez out for walkies was embarrassing.

I remember one day in the park his tally rose by four
A most amazing score he was amassing.
Two patient, perfumed poodles and an average labrador
And a wombat thet just happened to be passing.
I tried every way to curb his carnal appetites
I put him on a lead all day and locked him up at night.
I even put some bromide in his 'Crunchy Meaty Bites'
But the only thing that might have worked was kryptonite.

Then came the fateful day when he tried to consummate
A liaison with a saint bernard called Blodwyn
An although he was quite clearly fighting well above his weight
He didn't let that minor detail stop him.
He nearly pulled it off! Oh! What an acrobat!
But Blodwyn got bored and down she sat.
Now they say that after making love you often feel quite flat
I'm sure that Little Gomez would agree with that.

So I buried Gomez in the park, his happy hunting ground
A sad but fitting finale
Though I had to dig a hole that was sort of flat and round
'Cos he looked like a squashed tamale.
But I really missed my wee chihuahua chum
So I went down to the pet shop to find another one
Well I went in feeling cheerful but I came out feeling glum
'Cos the man down at the pet shop loved corny puns

And he said: "Yes we have no chihuahuas
we have no chihuahuas today.
We've alsations, dalmations
and the fruits of a liaison
Between a half-pint pekinese and a toupee.
But! Yes! We have no chihuahuas
we have no chihuahuas today.