[header] How to train a hamster to run through tunnels [title] Allow a new hamster time to adjust to its environment. [step] Let a new hamster settle into its home and get comfortable. Forcing your pet to perform a new activity, such as running through a tunnel, when it's still getting used to your house may cause your pet stress. 
If your pet is stretching its limbs, that is a good sign that it's feeling relaxed. [substeps] Anytime after the first week when your hamster appears settled is a great time to begin training.