A pet exercise device having outer and inner shells having first and second apertures defined therein, respectively, is provided. An elastic, deformable push switch sheet is disposed on the metal dome. The invention further relates to genetic complements of plants of variety CH144219. The shape control includes separable controls for numerical aperture and focal position of the imaged OCT beam. This pattern is then used to construct a modeled image, which in turn is used to construct a model-based feature map. The invention includes providing a switching mechanism positioned intermediate to a DC power source and the starter.