The Palmerston North City Council is offering free de-sexing to dogs registered as menacing on their database.
Council currently has 157 dogs classified as menacing, and 52 of these are not de-sexed.
In partnership with Massey University's Veterinary Teaching Hospital, the scheme will provide free de-sexing operations.
Funding for the programme was obtained through the Department of Internal Affairs national action plan to reduce the harm and risk of dog attacks.
PNCC head of environmental protection services Graeme Gillespie said the programme was designed to reduce the number of menacing dogs by stemming unwanted breeding and decreasing aggressive behaviour.