RCMP moved into the ostrich enclosure on Tuesday where Katie Pasitney and her mother, Karen Esperson, stayed overnight. CFIA says BC ostrich farmers must leave by Tuesday or face arrest. The inspection agency moved in on Monday along with a police escort to prepare for the cull of about 400 ostriches on the farm where avian flu was detected last December. Belinski said that about 30 minutes before the arrest Pasitney told him they were being allowed to feed the animals. It said a source of infection or reinfection with avian influenza can remain in the environment long after individual infected birds have recovered.