Everest, a nearly 4-month-old snow leopard cub at the Brookfield Zoo received an early Halloween treat during the zoo’s annual Cat Awareness Weekend in Brookfield, Ill. During the event, guests learned about some of the zoo’s endangered cat species, including the snow leopard, and conservation efforts to help them in the wild. (AP Photo/Chicago Zoological Society, Jim Schulz) Everest, a nearly 4-month-old snow leopard cub at the Brookfield Zoo received an early Halloween treat during the zoo’s annual Cat Awareness Weekend in Brookfield, Ill. During the event, guests learned about some of the zoo’s endangered cat species, including the snow leopard, and conservation efforts to help them in the wild. (AP Photo/Chicago Zoological Society, Jim Schulz)

Everest, a nearly 4-month-old snow leopard cub at the Brookfield Zoo received an early Halloween treat during the zoo’s annual Cat Awareness Weekend in Brookfield, Ill. During the event, guests learned about some of the zoo’s endangered cat species, including the snow leopard, and conservation efforts to help them in the wild. (AP Photo/Chicago Zoological Society, Jim Schulz)