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.

About 4,000 birds were found dead in the truck, and 10,000 others were stranded there for three days, state officials said. The hatchery that shipped the chicks said it did not know why the shipment had never made it to its destinations.