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.

The thousands of baby chicks rescued earlier this month after being left in a truck for days at a New Castle post office have been adopted, First State Animal Center and SPCA announced on social media on May 22.

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