The WHO states that there is no evidence of pet to human transmission. The one dog in Hong Kong with the weak positive (after the test sat for two full days, when results are usually taken within hours) was living within an infected owner. Blood tests to confirm if the dog has the virus in its system are still pending.
This virus is a droplet-borne disease, transmitted from person to person in the vast majority of cases through sneezing, coughing and close contact. As for the N-95 masks, the vast majority of people will be wearing them incorrectly. During SARS, our masks were custom-fitted to endure maximum protection. This took half an hour with the infection-control team. If you're not used to wearing a mask, you will be constantly adjusting it - which only brings further unnecessary contact with your face.