Walter (Animal)

Walter is a domesticated dog. His owners' house is the house that Lee's group encountered in Savannah. When the group arrived, Walter was buried and died of an unknown reason.

Savannah, Georgia
Nothing much is known about Walter's life before or as the outbreak began. All that is known is that he was a domesticated pet that belonged to Fivel and his parents.

Post-Apocalypse
Nothing is known about what happened to him after the outbreak except he might have been attacked by walkers. This is speculated seeing as when Lee digs up his grave, he uncovers Walter's body with bite marks all over it. Inside the house, he is seen in a family portrait along with Fivel and his mother and father. Later on, he is then reburied with Fivel who died in the attic of the house.

Killed By
It is unknown how Walter died, but the circumstances imply that he either died before the apocalypse or at the beginning of it: he is seen dead and buried next to his dog-house. Lee Everett had to dig up Walter's grave to take a collar from around his neck, in doing so, Walter's decomposed body was so fragile, its head fell off, releasing the collar.
 * Unknown Cause

Trivia

 * Walter is one of six dogs seen in The Walking Dead, the others being Max, three Nursing Home Dogs, and an unnamed Woodbury dog.
 * He is also the second animal seen in the Video Game, the other being Maybelle.