Animal-activated feeding systems and methods. The method allows a remaining film part to be formed thinner and more uniform on a substrate than the conventional techniques. In addition, a transmission selection switch selects one of a unique word insertion unit and a cyclic prefix insertion unit that create a frame format for FDE reception and a pilot insertion unit and a complex scrambling unit that create a frame format for Rake reception, and data is then transmitted. A space between the base of the electrode package and the bottom of the container contains at least some of the excess quantity of electrolyte. The suspension assembly is movable between an uppermost position wherein the upper and lower spring assemblies are pre-compressed, and a second position wherein the upper and lower spring assemblies are further compressed. The flow-directing element has a cleaning position in which the fluid outlet end extends into the header when the first end of the housing is connected to the header.