CAMDEN, Del. (AP) — 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.

All the surviving birds, estimated as more than 5,000 chickens — it was too hard to get a specific count — plus some others like turkeys and quails, were primarily adopted by local families, rescues and farms, according to First State Animal Center and SPCA.

The chicks were part of a 12,000-bird shipment left unattended in a truck at a Delaware mail distribution center. Trapped in high temperatures without food or hydration, thousands died, according to the state Department of Agriculture. The U.S. Postal Service has said it is investigating the “process breakdown” that occurred.