This was a pet store.
With Nicholas leading the way, the group comes upon a group of walkers feasting on Sturgess' body. Nicholas becomes paralyzed with fear again, but snaps out of it when Glenn calls his name. The group backtracks, only to be confronted by more walkers. They retreat into a pet store, where Glenn formulates a plan to set fire to a nearby building to distract the herd. Nicholas suggests a feed store, and offers to lead Glenn there.
Annie and Scott point out that their injuries are slowing everyone down. They urge the group to keep going without them. Heath looks pointedly at Michonne, and refuses to leave anyone behind.
Afterward, Michonne confronts Heath about his attitude. He tells her he overheard Rick's instructions to leave his people behind. Michonne angrily reminds Heath that he hasn't been "out there" like Rick has, so he wouldn't understand why it's sometimes necessary to leave people behind. Heath counters that he's been on plenty of runs, but Michonne points out that he's never "been covered in so much blood that you didn't know if it was yours, or the walkers', or your friends'."
Michonne's group sits quietly, watching as walkers (drawn by the sound of gunfire) move past the storefront. Michonne sees David writing a farewell note to his wife. When he tries to hand it to her, she refuses to take it. Instead, she writes, "You're getting home," on her arm, and shows it to him. Suddenly, walkers that had been lurking in the back room of the store begin pounding on an interior door, drawing the attention of the walkers outside. As the herd arrives in town, Michonne's group races out of the store, guns blazing. However, Annie falls and is devoured by walkers.