Is a teacup pig a rodent?

No, a teacup pig is not a rodent. Teacup pigs are a breed of domestic pig, specifically miniatures of the standard pig, and belong to the family Suidae. Rodents, on the other hand, belong to a different order called Rodentia, which includes animals like mice, rats, and squirrels. Therefore, teacup pigs and rodents are entirely different types of animals.