Sylvia mentally face palmed herself, realizing that of course the barrel would be closed so that animals can't get inside, but it did smell like somebody really messed up on their cookie recipe. Too much water, not enough flour. Of course, she caught sight of the Lightning Company's mark in the brick. So this was another dead drop for them...
However, what Dinah heard and saw next, chilled Sylvia's blood. A mangy dog was attracted to the smell, and it just saw Dinah. She gasped, and didn't even hesitate. She snapped herself out of Dinah's vision and hearing, and quickly snapped her fingers to summon Dinah back to her, and out of that precarious situation. She pointed towards the space right in front of her, hoping to get Dinah out of there in time.