Please choose the correct ending to complete the given sentence: Pets and Animals: [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.

Ending1: [substeps] Notice how the hamster reacts to your touch and be cautious to not upset it further. The best way to determine whether your hamster is sick is to take it out of its cage and gently say " is it sick? " don't try to physically touch your hamster. Ending2: 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. Ending3: Typically, a sick pet may urinate more than usual, act meaner to humans, or sleep less. Sudden death of a pet could also be triggered by decreased socialization skills. Ending4: Does it seem to have changed dramatically? If so, then euthanization is probably a good option for your pet. [substeps] Communication early on is key to ensure that your hamster is as healthy as possible.

Answer format: ending1/ending2/ending3/ending4