Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to care for old hamsters [title] Provide a one-story cage. [step] This will ensure that your hamster will be able to reach everything in his cage easily without too much effort or discomfort. [title] Change the bedding.

Ending1: [step] This should be a mix of wood shavings and pine fiber, then cardboard tubes from the vet's office, or similar materials. It should not be so white that it is not solid. Ending2: [step] The bedding in your hamster's cage should be spot cleaned daily. This is where your hamster's excrement goes, so you don't want to keep that around for too long. Ending3: [step] While hamsters obviously love old bedding, they do not like changing bedding over time. The bedding should be neutral in appearance, generally made with natural materials such as straw or wood shavings. Ending4: [step] Hamsters require a constant supply of hay, bedding, and warmth at all times. Always start with a wood-shavings bedding when replacing the hay.

Answer format: ending1/ending2/ending3/ending4