Average life expectancy of animals: Cat, dog, horse, sheep, monkey, giraffe,...

Dogs are our close, loyal friends. The lifespan of dogs is often very long, sometimes up to several decades. The average lifespan of a domestic horse is 20 to 30 years, and a wild horse is 15 to 20 years. The average lifespan of a sheep is between 10 and 12 years. However, some sheep have been recorded to live as long as 20 years. A sheep's age can be calculated by looking at its front teeth during the first few years of its life.