I buy Oxbows pellets from the piggy vet in Booragoon. Pellets are not for everyone, and they are quite pricey. A bag costs $24.20 and between 5 pigs last 3-4 weeks giving them 1/8th of a cup each a day. They also sell bags of chaff (finally chopped hay, without any seeds or added bits and pieces). They are quite small bags and cost $5. I am going to ring them up and see if they will give me some bigger bags as it would probably work out more cost effective.
Anyway, most people feed a pellet based diet or a grain mix based diet or a combination of the two. Personally I don't like the grains. So I choose to feed a pellet based diet and supplement that with the chaff. You can make up your own grain mix and there is a thread on that which I will find for you in a minute. Petstore grain mixes can be a bit iffy, they don't always have an ingredient list so half the time you don't know what is in it. I did feed a grain mix diet awhile back, and I purchased them from City Farmers. I always looked for the bags with more chaff then seeds.
If you are going to go down the route of making up your own grain mix, which would work out cheaper in the long run but can be confusing to get together, I would suggest looking into some feedstores. I go to Oakford Feedstore down near Armadale (a long trip!) to buy a bale of hay every month. They have quite the range there; wheaten, oaten and meadow hay. They also have bags of lupins and other grains that you can use (mainly sold for horses).
So far what you are feeding them sounds pretty good. With the hay I would probably suggest City Farmers if you only have a couple of pigs. They sells bags of oaten hay that should last 2-3 weeks maybe. Otherwise a nice bale of hay can be purchased from a feedstore as I mentioned before. Make sure that they always have hay as well, that is very important. The long strands help file down their back teeth and help with their digestive system. As long as they have plenty of hay they should be fine teeth wise.
Just to summarise in case I have completely lost you!
- Hay is the most important, the greener the better but this time of year it is hard to find anything green. Look for a grassy hay like oaten, wheaten, meadow, pasture etc
- Veggies are also essential, they provide vitamin c amongst other things. For your little bubs veggies high in calcium are good, carrots for example. Once they hit 6 months ease up on the calcium. The more variety you offer the better.
- Pellets/Grain mix. Probably the most confusing bit. A good quality pellet would be Oxbows Cavy Cuisine which is the one you can get from the piggy vet in Booragoon. Otherwise it is a grain mix, which you can make up or purchase from somewhere like City Farmers.