Dog training collars are useful for reducing excessive barking, though it is impossible to prevent a dog from barking as it is their means of communication.
However, some dogs do not respond correctly to spray stimulation, in this case you can try training collars with electrostatic stimulation that are triggered by the vibration of vocal chords when the dog barks.
It is possible to adjust the intensity of electrostatic stimulation collars more accurately; there are usually 8 possible levels (see our Effitek range).
Contact your veterinary surgeon for advice on behavioural problems.