What shampoo do you use to wash a guinea pig?

You should not use any human shampoo. Many people used to suggest baby shampoo, however, there may be some additives that are harmful to your piggy. Gorgeousguineas.com offers natural products made specifically for their skin and coat. You can also find small animal shampoos at pet supply stores. Most shampoos suitable for ferrets or rabbits are also fine for guinea pigs. If you are unsure about any product, make sure to check with your vet before bathing.