Around 1,800 newborn chicks who were abandoned in a field near Crowland have been killed due to a case of bird flu nearby.
The chicks, which were found in the field huddled together to stay warm, were first discovered on Friday, February 17.
The young chicks were no more than a day old, but all had to be culled due to a case of bird flu at a nearby farm.
RSPCA officers are continuing to investigate how the chicks came to be there.
A spokesperson for the RSPCA said: “Very sadly, the RSPCA has learned that the surviving chicks which were dumped in a field in Crowland on Friday have been put to sleep due to a case of avian flu nearby.
“We are sorry to hear of this outcome.
“We are still investigating and urge anyone with information to contact us on 0300 123 8018.”