we just use the dick van patten's natural balance cat food and get a case for free after buying 10 cases.(using their program...calling the 1-800 number on the can)
same with the dry food.buy 10 bags get 1 free.
i was thinking of changing their food because we are moving soon and wasn't sure if we could still buy it close by but we found a place online to deliver it at wholesale price.
cat litter is a different story...we try to get the litter that isn't dark and dirty looking.that litter is usually the cheepest.
we can't afford the real good litter but we won't use that dark crapy stuff.
it gets dirty to quick.hard to clean the boxes after...gets mooshy.