barry1956 is on the money.
these types of items were carried in bulk form in bags. Quite often they were carried by pack animals such as bullocks that could be slaughtered down the track when ration carrying requirements decreased.
Native animal use would have been limited, unless other live meat supplies had been exhausted.
Interesting that Bourke & Wills started off with a boat, dining tables & chairs, silverware and other exhorbinant supplies. guess that explains why most of them failed 2 return, they failed to take advantage of what was available on the way. They even shunned the natives when they attempted to assist.
Have a look at this website:
http://www.burkeandwills.net.au/Stores/provisions.htm