i used to breed new zealand whites cross californian, and i used a dutch buck sometimes because dutch have good meat ratio to bone and they mature really quickly, as for food it never cost me a penny for food or litter what i would do was take a metal hook and collect hogweed ,dandilions ,clover and vetch in an unpolluted area, for the litter i would collect the dead dry reeds from down the marshes,they would also eat a certain amount of this , i never had any problems with my rabbits and when they were gutted the fat around the kidneys would be snow white and lovely healthy kidneys