I think there’s a food bank in the town near to me. I’ll have to inquire about if they serve the surrounding area, but I’m guessing not due to a large low-income population.
As for brands, the only brand of food that I’ve ever stuck with unequivocally is Philadelphia cream cheese. Not out of loyalty but because nothing can stack up to it. I’ll eat own brand for everything besides cream cheese.
I have neither of those stores in my area. At Walmart, chicken is $20/kg like every other store.