Impregnable (15)

Passing by the bottle of window cleaner that lay empty on the counter, she rummaged furiously through the cupboards.  Finally she turned up a can of oven cleaner.

Aerosol can in hand, she advanced grimly across the lawn.  She climbed the ivied bank, her breath hissing over her teeth.

As she drew near, the dog dropped into another front-end crouch, his plumed tail still waving—as if this, too, were a game he played frequently at home.

Paulina raised the can to shoulder height.

Kasha burst up the slope from behind her, apparently wanting to join the game, too.

The retriever dashed backward at Kasha's advance.  As Kasha reached the fence, she wheeled and raced back down the slope, continuing on across the open lawn.

The retriever turned and chased her.  Matching her stride for stride, he was oblivious to the fence until it was too late to slow down.