More than 130 hamsters escaped from their damaged shipping boxes during a flight from Lisbon, Portugal, to the Azores islands, where they grounded the plane for a four-day “nightmare in hamsterland.”

When the ill-fated plane, carrying the crew, passengers, luggage and a pet store order of 132 hamsters, ferrets and birds, landed in the Azores last week, baggage handlers realized the boxes were damaged and the rodents were missing. according to reporting by the Portuguese Resident.

Flight crews acted quickly to retrieve the hamsters before they could damage the plane’s electrical wiring.

Although 16 people were still missing as of Sunday morning, all have since been recovered and the plane returned to Lisbon by the end of the day, the Portugal Resident reported.