Police are appealing for witnesses to the killing of 40 chickens in a Wellingborough allotment.
The victim arrived at his allotment on the morning of 10 January to find that around 40 chickens had been killed, as well as a turkey.
A goose had also has its wings broken and had to be put down.
The incident occurred between 3.00pm on Wednesday January 9 and 11.00am on Thursday January 10 at Ladywell Allotments, Finedon Road, Wellingborough.
The killing has not been reported to the RSPCA, however a spokesman for the charity said: “This sounds like a very cruel and heartless incident regarding the killing of defenceless animals.
“We would urge anyone with information to contact the police immediately as they are investigating this.”
Witnesses to this incident, or anyone with information, should call Northamptonshire Police on 101 - alternatively, information can be given anonymously to Crimestoppers on 0800 555 111.