In Spain, "pan de perro" is mentioned as early as 1623 in a play by Lope de Vega. It is used here in the sense of giving someone blows; to "give dog's bread" to someone could mean anything from mistreating them to killing them. The latter meaning refers to a special bread (also called zarazas) made with ground glass, poison and needles and intended to kill dogs.
There are a few things in this recipe that are not good for dogs, so I substituted them for things they could digest. I took out the all-purpose flour, cornmeal, salt, sugar & butter and replaced them with Whole-Wheat flour, honey, and peanut butter. I didn't bother cutting the cookies with a cookie cutter, but rather rolled them into bite-size balls and flattened them into discs. My dogs were "sitting pretty" for them before I even got them into the oven!
Bake these healthy treats a shorter time to keep them chewy, or a little longer for a crispy outside and chewy center. Combine a pound of ground beef, turkey or chicken liver with 1 C. corn meal, 1 1/2 C. flour, 1 tsp. anise seed and 1/2 tsp. salt. Spread into a greased baking pan, bake at 350 degrees for 20 minutes, and slice into squares when cool. Substitute fennel for anise if needed. Add an egg, or grated apple or carrot for more nutrition and flavor. Any ground organ meat, such as heart, can be used in place of liver. Dogs love these chewy brownies with nearly any kind of meat.
We have a half Siberian Husky/half German Shepherd mix with loads of energy. So much so that getting him to slow down and listen is a task. Then we found Purina Alpo Variety Snaps Little Bites Dog Treats that worked perfectly in gaining his undivided attention. However over the years, he's become older and not so excited over these treats, too used to them. So to change up things, we bought this Milk-bone Soft Chewy Dog Treats, and oh my gosh. He's back to learning all new tricks again just for a small taste of these. What is so funny now, we offer him the Little Bites Treat square and he's all excited and grabs it, but then drops it immediately while sitting in the at attention pose with no movement at all waiting for this new Milk-bone Soft Chewy Dog Treat..... Once we give him that, he is all posed for another trick/training lesson. Of course if we leave the other square treat laying, he will quickly snatch it up after the Milk-bone treat is gone. But we are so happy he is happy and attentive with these. Thank you!