Repelling rodents

1. A rodent repellent device comprising:

a housing comprising a base supporting a lid, the housing substantially enclosing a porous storage medium in an interior region of the housing;

a repellent disposed within the storage medium, the repellent comprising a component of feline urine that disperses into atmospheric air at room temperature;

a frangible membrane sealing the porous storage medium within the interior region of the housing; and

a tab extending from the frangible membrane and exposed to be pulled to tear the frangible membrane to expose the repellent;

wherein the housing is operable to expose the repellent to air circulation;

wherein the lid is attached to the base and is rotatable between:

a closed position in which the lid and the base engage to form a seal restricting hydraulic communication between the interior region of the housing and the air; and

an open position in which the lid and the base define passages enabling hydraulic communication between the interior region and the air;

wherein the frangible membrane is a portion of a plastic bag and the tab is a flexible strip extending from the plastic bag, between the lid and base, and beyond and outside the housing.

2. The rodent repellent device of claim 1 wherein the component of feline urine comprises felinine.

3. The rodent repellent device of claim 1 comprising no more than one teaspoon of the repellent.

4. The rodent repellent device of claim 1 further comprising a scented compound selected to at least partially mask odor of the feline urine component from human detection.

5. The rodent repellent device of claim 1 wherein the storage medium comprises a multiplicity of cotton fibers.

6. The rodent repellent device of claim 1 further comprising an adhesive disposed on an outside surface of the housing and arranged to secure the device to a mounting surface.

7. The rodent repellent device of claim 1 contained within a sealed package configured for retail sale.