A Singapore Airlines Boeing 747 from Sydney was forced to make an unexpected stopover after methane gas set off the fire alarm.

The Aviation Herald reports the cargo flight from Australia to Kuala Lumpur, with 4 crew and 2186 sheep on-board, was flying just to the south of Indonesia when the smoke alarms sounded on October 26.

Crew on-board SQ-7108 descended the aircraft immediately and diverted to Bali where they landed about 45 minutes later.

Emergency services didn’t find any trace of fire or smoke and identified the cause to be the result of exhaust gasses and manure produced by the sheep.

The plane and its stinky cargo were able to depart the holiday island about three hours later.