You would only know about this commercial if you live in Canada because it's only aired there. Anyway, when the owner of the dog takes the dog for a walk and it poops, you can tell that it's dry like it was sitting for a long time. That is slip-up #1 because it should be wet since the dog just went. Slip-up #2 is when the woman runs in and rolls in the poo. When she gets up, the dry poo is crumbled on the ground, but the poo on the woman's shirt is wet and smearing. She had it on her shirt in advance. That's why it only showed her back when she ran in.