Goats are the perfect animal for an inhospitable environment. They eat almost anything; generally don't stray; can survive droughts that kill cows, pigs, cattle, chickens and sometimes even camels; they supply meat, milk and cheese; and produce leather and cashmere that can be made into clothes, tents and other things.
Goats are related to sheep. Both animal produce hairs that can be used to make clothing. The most obvious difference between the two animals is that goat’s hair is cashmere, sheep’s hair is wool. In addition, the goat tails stand up while sheep tails hang down; male goats have beards while male sheep don't; some varieties of non-wool producing sheep have short hair and look sort of like goats. But they are two totally different type hairs. Cashmere is more precious than wool.