Thousands of chicks found abandoned inside a postal service truck for three days have gone to new homes, according to the Delaware shelter that had cared for them, with the last batch picked up on Thursday morning.

More than 12,000 chicks at a Delaware distribution center were found left in a USPS truck for more than three days.

Delaware officials are pleading for caretakers to rehabilitate thousands of baby birds that were abandoned in a U.S.