Hi Love i live in Victoria also!
I feed my girls meadow hay from the produce stores

i buy mine from Mt. Evelyn, i don't know where abouts you are? I'm from Croydon.
Dont feed the mix they offer either in small bags, it's got lots of mollasses in it which is not good for piggies!
I buy a bag of the Dux piggie and rabbit from the supermarket (woolworths have it) it's not the best but it's the only product i can find without molasses!
I then feed broccoli and leaves, cauliflower, green beans, green and red peppers (take out the seeds!), cucumber (i buy the continental), and snow peas. One of my girls is diabetic so limited diet. They also eat cos lettuce (NEVER ICEBERG!) and the asian greens, silverbeet too.
If you tell me your area i can look up some info for you!
Glynis, Velvet and Onyx x