This Thursday, May 3, 2018 photo shows skeletal remains of animals in a ravine adjacent to a watering hole where dozens of horses were discovered dead near Cameron, Ariz. A couple of miles off the highway through northern Arizona is one of the most stark examples of the toll drought has taken on the region: more than 100 dead horses surrounding by cracked dirt, swirling dust and a ribbon of water that couldn't quench their thirst. Officials on the Navajo Nation are working to cover the site with lime to help the animals decompose and keep away scavengers. (AP Photo/Felicia Fonseca)