Attention, fellow soup-lovers: Arcadian Pastures, a farm that raises cattle, pigs, lamb, and chicken in Sloansville, New York, peddles meaty marrow and neck bones perfect for stock at the Wednesday Union Square Greenmarket. Although the bones are meant to be $1.50 each, you’ll likely get a little extra thrown in. This bag, which weighs about 5 pounds, enough for a big pot of stock, cost $5. It contains lamb neck bones and huge cross-sections of cow’s knee, both of which come from animals that were pasture-raised without hormones or antibiotics. The farm does all of its own slaughtering, so they can offer all the bits and pieces at low prices. Try this classic stock recipe.