Three teenage boys have been spoken to by police about the air rifle attack on a group of bulls at a visitor attraction.
The incident happened at the West Lodge Rural Centre near Desborough some time between 11.30am on Saturday, June 20, and 6.30am on Sunday, June 21, when about 14 bull calves were attacked and injured.
Northants Police say their appeal for witnesses was shared widely on social media and in the local news, and a number of people came forward with information.
As a result, officers have spoken to three teenage boys in connection with the incident and the investigation is continuing.
Anyone with information is asked to call Northamptonshire Police on 101.