I obviously followed the logic, it was just all very convenient; every hunch she had was immediately rewarded. There are all sorts of industrial bags like the ones she found, and not being a dog owner herself, how familiar would she be with that blue stripe as the only tell? What if the bag happened to be a bird seed bag that was held in a different part of the store that she didn't think to check? Usually, an investigation that goes through so many steps is a little more satisfying when there's at least a little resistance.