The relationship between New Zealand and Australia has always reminded me of the relationship between siblings. We will whinge and whine about each other. Tease each other. Be very competitive in every area possible.
There's lots of loyalty though, and if anyone else wants to have a go at our trans Tasman neighbours, Australia is pretty damn quick to come to their defence. Likewise we will help any time it is needed.
At the moment our Kiwi neighbours need all the help they can get. The earthquake that rocked Christchurch was horrific. If you can spare anything, a great place to donate is Red Cross New Zealand.