Rick Grimes' Horse

This horse is encountered by Rick Grimes on his way to Atlanta.

Rural Georgia
This horse resided on a farm somewhere in rural Georgia, in proximity to Atlanta. An unnamed family owned it, caring for it and keeping it in a barn behind their farmhouse.

Days Gone Bye
While Rick Grimes was heading toward Atlanta, he attempted to find a gas station for his car. He reached a gas station, but no gas was available. Rick decided to walk and headed to a farm down the road. He entered the house and was instantly hit by a foul smell. The family of four were all seen dead, having committed suicide (or murder–suicide). Rick ran out into the backyard and entered the barn. Inside, he noticed a single horse, and allowed it out of its pen. Rick decided to ride it to Atlanta.

Once in Atlanta, Rick rode the horse down the abandoned streets. He came across a street full of zombies and was forced to flee and escape into hiding. The horse managed to kick and kill a few zombies, but was quickly taken down and devoured by them.

Death
Rick Grimes entered Atlanta on the horse and walked through a street with zombies cluttered in alleyways. Then as he is on the horse, a large group of zombies cluttered in the center attacked Rick and the horse.
 * Killed By
 * Rick Grimes (Indirectly Caused)

Eventually, after being in the street for a few minutes, the horse was attacked by zombies, taken down and devoured. Rick is forced to hide after his loss of transportation.
 * Zombies

Killed Victims
This list shows the victims this horse has killed:
 * A few zombies

Season 1

 * Days Gone Bye
 * City of the Damned (Corpse)

Trivia

 * This horse is the first animal in the comic series to be killed by zombies.
 * It is also the first animal shown killing zombies.
 * Rick refers the horse as "girl" so presumably the horse is female.