We went to the Pet Expo this year and my two boys had an absolute ball - feeding the goats, seeing all the dogs, cats and the bird display.
However saying that I felt that it could have been better. I felt it could have been advertised better and had a dedicated website & facebook page of it's own that visitors could get inspired and excited by.
If you are looking for some more events to attend this year I have collated a huge range of events, expos, doggy days out etc all over Australia. If you have an event that you are organising feel free to send us the details and we'll pop it up there! http://www.dogculture.com.au/content/9-events