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. “So, they were going out feeding, and they got arrested in the back corner where nobody is,” he said. They would be allowed to return home, but would not be allowed back into the ostrich enclosure, Clark said. It said a source of infection or reinfection with avian influenza can remain in the environment long after individual infected birds have recovered.