We have 4 kids still at home, who all eat like adults, 1 dog, and 4 cats. We just changed to buying everything except dairy and fresh produce in bulk (enough for 6 months) to save money. We are spending about $450 a week on household expenses, which for us means gas, food (putting back money to buy bulk again), paper goods, incidentals, pocket money, and the kid's activities. That doesn't include any bills, our 5 cell phones, or clothes. I'm not sure if that's good or bad, it just seems to be what it takes for us.