The former Catelli Brothers slaughterhouse on Route 35 in Shrewsbury, the target of protests from animal activists, will soon be just mound of crushed concrete. Workers from Nacirema Demolition and Recycling, Inc. in Matawan started to rip down the building on Monday. It will make way for a Sunrise Senior Living assisted living center. "There wasn't a comfortable place for a slaughterhouse in town," said Mayor Donald W. Burden. "The neighbors were complaining about it, the noise levels and so on.