A pet shelter that is substantially smaller than a single family human residential structure includes an accessway, a platform that is located at a first level above the accessway, and a device configured to assist a pet in moving between the accessway and the platform. The elongated member and protruding members are sized and positioned to substantially fill or cover an opening of an electronic device. Methods of protecting an article, such as a food product like cheese, are also provided and include coating or encapsulating the article with a composition containing a low molecular weight polyhydroxyalkanoate, a terminally-modified polyhydroxyalkanoate, or both. The rocker arm assembly further comprises a cam follower disposed about a mounting shaft extending into shaft openings defined by the side walls, and a pin member defining a valve pad for engagement with a stem tip portion, the pin member extending into pin openings defined by the side walls. Connecting parts for fastening the drive within an elevator shaft or in an engine space, or for adjusting a support means spacing, are mounted on the drive as required. The circumferential groove has a width and a depth, wherein the width and depth are approximately equal.