Crazy dog is a character in Season 3 of Fear the Walking Dead.
Very little is known about Crazy Dogs life before the outbreak. It can be assumed he was born on the Black Hat reservation, or at least had some connection to the tribe as he is of Native American decent.
At some point after the outbreak, Crazy dog links up with the Black Hat tribe. He is part of the group that seizes Madison and Troy (alongside other members of the Survivalist Organization) at the outpost during the events of Burning in Water, Drowning in Flame.
He is later seen during the events of The Unveiling, where he helps capture Jake and Alicia when they arrive at the Black Hat reservation, as well as capturing Ofelia when she returns with Jake.