Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to clean hedgehog quills [title] Decide whether to use shampoo. [step] Shampoo is not necessary to clean your hedgehog's quills. In fact, some veterinarians and hedgehog breeders have recommended using only water to clean a hedgehog.

Ending1: If you decide to use shampoo, choose one that will not be harsh on your hedgehog's skin. [substeps] Cat shampoo is a good choice for cleaning your hedgehog's quills. Ending2: If you are not sure whether or not you would prefer to clean your hedgehog's quills, you can use a mild soap like ky jobb. [substeps] To apply the soap, splash a bit of water on his quills, then spray the quills with a small amount of water. Ending3: Because hedgehogs are naturally messy, it's safer to use shampoo rather than ordinary human shampoo because there is less risk of infestations. However, because hedgehogs are easily messy, trying to clean quills regularly after they have been dusted or scrubbed is the best option. Ending4: The soap acts like a paste to help soften the quills. However, using warm water may also help.

Answer format: ending1/ending2/ending3/ending4