Pavlov's Text

Jett has an interesting new habit.

He's learned that Rocky's owner will often text that Rocky is coming by to play.

Now, whenever a text comes through and the phone's sound is on, he gives a happy bark and excitedly heads to the window to look for him.

Oooh, I heard the text. Where is he!?! Where is he!?!

Poor dog doesn't realize that not every text that arrives means that Rocky is about to turn the corner ready to play. He feels kinda let down when that happens.

He's not coming, is he?

I'm going to need to make a custom text tone for Rocky's owner.  My bet is Jett will catch on and differentiate the meaning of the text tones very quickly.