5 points is too few

Encephalitis type: the incubation period is 53 to 131 days, mainly occurring in lambs aged 2 to 6 months. At the beginning of the disease, the sheep are depressed and lame, and then the limbs Stiffness or paralysis, lying down. Some sick sheep have nystagmus, head and neck tilt or circular movements, and sometimes have difficulty swallowing or are blind.