At the Time-Based Art Festival in Portland, from top: A collaboration by Seattleites Zoe Scofield and Juniper Shuey; Holcombe Waller; "Gatz" by Elevator Repair Service; and Nature Theater of Oklahoma...
Costco says it will investigate. The local warehouse-store company changed its practices after an earlier investigation by the same animal-rights group into the treatment of calves.