It depends on what characteristic you want to measure! Its mass, its height, the amount of body fat, the fineness of its fleece?
jolts or something
inches
Kilograms.
meeters?
Time
You would typically use kilograms or pounds to measure the mass of a sheep.
a centimeter
Feet.
A shoe.
You would use CM or INCHES to measure a knife
meters
inches
jolts or something
inches
Kilograms.
A kilometre.
Ounces or milliliters.