Sketch an incredibly detailed and hyper-realistic depiction of a dog reluctantly leaning on a cane. Pay meticulous attention to every aspect of the dog's appearance, from the unkempt fur to the hesitant grip on the cane. Capture the dog's facial expression with precision, conveying a sense of discomfort and vulnerability in its eyes and posture. Use shading and texture techniques to emphasize the frailty and instability of the cane, as well as the dog's sense of reliance and unease. Surround the scene with a somber and desolate environment that amplifies the dog's sense of isolation and struggle, perhaps incorporating elements like dark shadows or barren surroundings. The goal is to create a poignant and thought-provoking portrayal that highlights the challenges and limitations faced by the dog, evoking empathy and reflection from the viewer