Unrealistic anatomy, lack of expression, flat shading, overly busy background, unclear focal point, inconsistent lighting, awkward pose, lack of dynamic lines, dull atmosphere, lack of texture, generic composition, lack of playfulness, messy details, lack of depth, unnatural colors, stiff movement, lack of harmony, overly dark or bright areas, disproportionate body parts, lack of energy, lack of character in the dog, lack of variety in fur texture, lack of attention to detail.