I think in general first time pet owners need to be aware how time consuming and inconvenient looking after an animal can be. Raising public awareness of this would help, but goodness knows how to do it, and would people listen anyway. I know it is not always possible to map out your life for the next 15 or so years and that things change, but is moving house, changing job, having a child or getting a new carpet or kitchen (all reasons i've heard) an excuse to get rid of the dog.