Trading was very quiet to start the week. Snow and extreme cold across much of the Midwest is hampering logistics to start the week. Cattle slaughter finished last week at an estimated 653,000 head, up 3.4 percent from year prior levels. Slaughter is forecast to trend lower through February and into March. The next six weeks are forecast at an average of 638,300 head down 25,100 head per week compared to the last five weeks, which excludes the six week prior New Year holiday break. Live weights are forecast to fall as well which can…