I love these Otrivin nasal spray ads which cleverly depict the frustrations associated with blocked noses due to allergies. The ads show four hunting dogs unable to use their generally keen sense of smell to point to the animals they're intended to find. The ads illustrate how each season can be accompanied with allergies.
For summer, one dog has a fox, a rabbit and a bird wrapped around him. In the spring, the dog has a bird sitting on his back. In the fall, a hound has a fox wrapped around his neck, and in the winter, a black lab has a snow hare clinging to his leg.