Lantana - Thanks for sharing your experiences - I have a question - does the service dogs have trouble adjusting to change? Or do the trainers train them so they are used to change?
VamPyroX - You do make a good point about technology being much cheaper. However, I live in Australia and I rent - does this mean I have to install these things each time I decide to move?
Nesmuth - Thanks for your story - I do realise the costs of owning a hearing dog as I have had dogs as pets before.
The reason why I asked these questions is because I need some sense of security around the house and am interested in your opinions in case there are things I didn't consider while weighing up my pros and cons.
Thanks so much for all your help and stories, it was much appreciated.