The owners of 100 dogs had their pets microchipped for free thanks to a scheme by Crawley Borough Council and the Dogs Trust.
The mass microchipping was held at Southgate Playing Field on Thursday (July 10) and, due to its popularity, another has been organised for September.
A new law means all dogs must be microchipped by 2016.
Currently, all dogs must have a name tag but these can easily come off or get lost, whereas microchips are more secure and can hold all sorts of information, including details of the legal owner.
Cllr Colin Lloyd, Cabinet member for environment, said: “I’m very pleased this event was such a massive success. One of the Community Wardens’ key responsibilities is to deal with straying dogs and work to reunite owners and lost pets – a task made much easier if a microchip can be used.
“We’ve now microchipped more than 180 Crawley dogs and I’d like to see many more owners take up this great offer over the coming months.”
Dog owners can have their pet microchipped at home at weekends, evenings and during the day.
Email firstname.lastname@example.org to arrange an appointment.