Train the voles, first let the voles familiarize yourself with your scent, don't be impatient. Holding the calf vole when it doesn't know it will only make the calf vole panic. When the voles are familiar with your taste, you can train the lying hands.

Let the voles lie on your hands first, then give snacks. Snacks can only be eaten when the four grasps are facing the sky, and stop giving them when they turn over, so that the voles will know when they can eat snacks, so they lie down obediently.