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.

A Delaware animal shelter is trying to care for and rehome thousands of chicks that survived being left in a postal service truck for three days. Trapped in a warm enclosure, without food and water, thousands died before they were discovered on May 2, CBS affiliate WBOC reported.

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