Remove the stems and seeds from the chile guajillo. Remove stems only (if any)from chile de arbol. Transfer to a saucepan and cover with water. Bring to a boil, reduce heat and cook for 10 minutes. Set aside and prep the rest of your ingredients.
When ready, drain the water from the guajillo peppers and transfer to the blender. Add 1 1/2 cups chicken broth and blend on high until smooth. Strain the sauce into a bowl using a wire mesh strainer. Set aside.
Heat 1 tablespoon of olive oil in a deep skillet to medium. After a minute, add the onions and garlic. Season lightly with salt and pepper and saute for 5 minutes.
Add in the chile sauce, broth , bouillon and oregano. Bring to a boil, reduce to a simmer. Taste for salt and pepper. Add in the pozole, hominy and cook for 15 minutes. Add in the cleaned shrimp and cook for another 5 minutes. Remove from heat. Serve with your favorite garnishes. Yields 4-5 servings.