Hi There .

            Have been picking up a few calls concerning tenants dogs. Private landlords usually are not keen on tenants having dogs,so if it is written in your tenancy agreement No Pets do not get one. If you do the landlord can take you to the tenancy tribunal seeking your eviction that you broke the tenancy agreement.Talk to your landlord if you are thing of getting a dog and if they agree to your request,get it in writing not just verbal.
Housing New Zealand also have  a dog policy.But there is a lot more give and take, it all depends on the circumstances of the tenant whither they are blind or some other disability or a mental health issue and a pet dog is good for their well-being.

Just make sure you ask.The reasons  for not allowing dogs are that they make a mess in the house and cause problems and make a mess in the garden etc..