mower county sheriff terese amazi said farmer daniel weness , of leroy , reported on tuesday that a storage canister with vials of bull semen was taken from his unlocked barn .
the canister was worth about $ 500 , and the vials of semen were worth from $ 300 and $ 1,500 apiece .
the man said the only time he and his hired hand were away from the farm was on easter sunday .