Techniques for blood collection from the rat include puncture of the heart, retro-orbital plexus, jugular vein, saphenous vein, tail blood vessels, carotid artery, abdominal aorta, and vena cava.

The odd figure often has slight variations in structure, such as a different posture, tail, ears ... below (look at the extreme lower part of the picture to the left side) ...

Yet, hidden among these felines is a single rat—an elusive intruder designed ... such as a different posture, tail, ears, or facial features. Pay attention to these small details.