Police are hunting thieves who stole 50 three-week-old lambs form a farm in Hursley, Hampshire.
The Welsh Mule and Texel Suffolk cross lambs were taken some time between midnight and 6am on Thursday March 28.
Officers believe the thieves used a vehicle to transport the lambs from the field. Two lambs were found dead as a result of the theft.
PC Steve Rogerson from Hampshire Police’s CountryWatch team said: “Understandably the farmer is very concerned for the welfare of these animals.
“There is a possibility that the ewes could suffer and even die, and other lambs in the field could die as a result of shock.
“Those that were stolen are at risk of losing their lives in transit, or from being away from their mothers and not being kept in the right environment.
“Do you know someone who may have come into the possession of these animals, or a farm that has had a sudden and unexpected influx of lambs?"
Hampshire NFU adviser Sandra Nichols added: “We have been appalled at this theft as there are serious animal welfare implications for both the ewes and lambs.
“Anyone who has information should contact police and we also ask people to keep their eyes open, in case these animals should turn up somewhere.”
Farmers have reminded to check their roadside gates are secure.
Anyone with information is asked to contact the CountryWatch team on 101, quoting 44190107152. Alternatively call Crimestoppers, anonymously, on 0800 555 111.