[header] How to euthanize a sick hamster [title] Observe your hamster's behavior. [step] Emotions can make it very difficult to decide whether to euthanize a pet, even when the pet is very sick. To make the decision process a little easier, look objectively at your hamster's behavior. 
For example, watch how he walks-if his back is arched or he is unsteady on his feet, he could be feeling extremely sick. [substeps] Hamsters love to run and play.