An Ifor Williams horse trailer was stolen from a farm in Wilsford, near Ancaster, on Thursday.
Police are warning all farmers and horse owners to be vigilant and report any suspicious activity following the theft of the blue/green trailer, which had been attached to a vehicle.
A police spokesman said: “This is a timely reminder to ensure that all trailers and valuable and attractive items on farms and other premises are secured correctly.
“Also please report any suspicious vehicles and persons hanging about farms straight away to the police. Do not delay this call as stolen property can be miles away before we are notified.
“Please also photograph your property and keep the photographs safe for use should property end up being stolen.”
Information to police on 101.