Health Issues & Low Grocery Budget

Ok...so we've been cruising along for about 10 weeks averaging $60 a week on food.  We've been surviving but not thriving.  Mom is currently 31 weeks pregnant with baby #6 and was recently diagnosed with pregnancy induced anemia.  Children #3 and #4 are both gluten-intolerant.  Child #4 is a very picky eater and has been losing weight.  Her BMI barely registers on the growth charts for her age.  Husband is craving meat and mentions how much he misses pork chops, hamburgers, grilled chicken, etc.  It looks like we are going to have to increase our meat consumption which will raise our weekly average.  No way around it.  : )  We'll see what we can find on sale...