Final answer:
The veterinarian should use Wright's stain to determine if the cells are neoplastic or inflammatory. Wright's stain is a differential stain commonly used for blood smears to evaluate blood cells and identify different types of white blood cells.
Step-by-step explanation:
The veterinarian should use Wright's stain to determine if the cells are neoplastic or inflammatory. Wright's stain is a differential stain commonly used to stain blood smears, allowing for the evaluation of blood cells and the identification of different types of white blood cells. It stains red blood cells a pinkish-red color and stains the nucleus and cytoplasm of white blood cells various shades of purple. By observing the stained cells under a microscope, the veterinarian can assess their appearance and determine if they are neoplastic (indicating tumor growth) or inflammatory (indicating an immune response).