Apparatus and methods are provided for mapping out endoluminal gastrointestinal surgery, including endoluminal gastric reduction. 86 ggin of fluid in the intakedistribution layer andor essentially equal to or greater than 0. Further, the openingclosing bar may have swollen portions on both ends of the openingclosing bar 28A to enable the bar slide smoothly in the curl ring. However, if more than one authorized tag is present in the feeding time set for one animal, the drawer closes. A rear wheel is supported on an end portion of the swing arm, between a cross pipe that extends between left and right seat rails and the swing arm. The reference bar is configured to provide a direct electrical connection between the first reference bar terminal and the second reference bar terminal.