This another of Goya’s murals he painted in his house Quinta del Sordo that was transferred to canvas.
The painting shows a dog with only its head visible. He looks up following the line of the slope, hid ears are pulled a little backward, and hid eye is wide-open. Goya left no clue on its meaning, and there are many interpretations (yours will be as good as anyone of them). The format of the painting, the division between sky and ground, the colours and of course the dogs head make it a very unusual and haunting painting.