What song did Mozart wrote for his dog?

Mozart wrote a song for his dog Gaukerl...
what song did Mozart wrote for his dog?

Sure, it was his Op. 63,No. 9, Sonata in Bbm. It was only performed once, because the other members of the orchestra refused to go "Woof!" when indicated in the score.

The only dog I am aware he had was Trickster (nickname was Sugar).

I second that, you mean what song did Mozart write for his dog?

Do you mean "What song did Mozart write for his dog?"?
I have no clue.