Other things we put in the compost are: afterbirth, dead chooks (ones that die of old age), feathers etc from our poultry processing. We layer these with wheel barrow loads of cow manure.
A lovely fresh cow pat - it's best to be really fresh when covering dead animals or feathers etc.
We use pallets as the framework for our bin and once it's full, we put a cover over it and leave it for twelve months. By this time the pile is about half the size and turned into a lovely compost.
Feathers don't really break down completely and you do sometimes find some bones, but that's all good!
Of course, this would be a bit tricky for most people to do. I've never been terribly successful before this in making good quality compost and found that the best way for me to do it was to use worms. I used a compost bin and would through the scraps each day in and some manure and weeds every now and again. The worms would do the work for me and I would just collect it from the bottom of the bin. ANYONE could do this - even in the city (well maybe with out the manure!) Worms will eat just about anything that was once living and there's lots of good stuff you can find on the internet to help you if you need it.
I'd love to hear what other people do to make compost. It's a great way to get rid of scraps if you don't have chooks to eat them, although if you had chooks, the chooks make the compost for you - the ground in their pen is lovely for the garden.