There are many cats with blue hair. In addition to the most common British short-haired cat, Scottish fold cats, Russian blue cats, Carter cats, etc. all have blue hair. The characteristics of the British short hair are more obvious. The limbs are very short and easy to identify. You need to be extra careful when raising a cat. The diet is mainly cat food. Feed some lecithin, egg yolk, fish and other foods appropriately to promote the growth of the cat's hair. In addition, the cat should be vaccinated and dewormed on time.