The Monthly Social Index Spotlight: Petco, PetSmart, Sprint, T-Mobile

Both brands posted adorable animal photos, and presumably customers of each brand are equally passionate about their pets. Each has cute names for things: Petco says “caturday” instead of “Saturday” and PetSmart calls it a “pawfice” instead of an “office.” Both retailers post at about the same frequency. So what’s going on? What's Petco doing to get an advantage over its competition?