The F-B-I is being summoned to help investigate after two Iowa farms in the past week have been vandalized and sabotaged. The latest incident involved hundreds of pigeons that were taken from a breeding farm in southwest Iowa’s Mills County on Saturday.Mills County Sheriff’s Deputy Bruce Paulsen says about 400 pigeons were taken from Double-T Farms near Glenwood. He says only a few of the birds have returned.A fax from a Canada-based animal rights group claims its members released the birds because they were being bred to be “tortured to death in biomedical research laboratories.” The Animal Liberation Front also claims to have broken into a northeast Iowa mink farm last week, releasing thousands of minks. After last week’s mink release, Chickasaw County authorities said it would be hard to make any arrests in the case. Even though a group has claimed responsibility for the animal releases, only individuals can be charged.