Warning to the folks who prepare the team meals in the New York Giants' dining hall: make sure you pad your weekly food orders this season! These players are going to need plenty of fuel ... In the past week alone, the team reportedly added four players - all defensive tackles - . Shelby Harris (6-2, 290) and Leki Fotu (6-5, 317) signed as free agents, Zacch Pickens (6-4, 303) was claimed off waivers, and Lions free agent D.J. Reader (6-3, 330) reportedly agreed to a deal. So the Giants added more than a combined 1,200 pounds to a perceived thin spot on the depth chart. Remember, these defensive additions came on the heels of the team drafting linebackers Arvell Reese (6-4, 240), Jack Kelly (6-2, 240), and defensive tackle Bobby Jamison-Travis (6-3, 328). And the most important defensive addition to the roster came a month earlier in free agent middle linebacker Tremaine Edmunds (6-5, 250). New York Giants defensive coordinator Dennard Wilson has promised a violent, imposing defense for Big Blue.…