Add the stock, along with the browned rabbit into the pot, bringing the mixture to a gentle simmer. Cover the Dutch oven with a tight-fitting lid and place it in the center of the preheated oven. Beer Braise for about 2 hours, depending on how accurate the oven temperature is. The rabbit should be fork-tender, but not completely falling off the bone. Remove the pot from the oven and place onto a burner, over medium heat. Carefully remove the rabbit pieces to a plate. If there is not very much braising liquid left, add more beer or stock to the pot. Add lemon juice (to add a touch of acidity to the sauce) and sprinkle in the flour and parsley. Using a whisk, stir as the liquid comes to a boil. The sauce will thicken as it cooks for 1 – 2 minutes, cooking out the starchy taste of the flour. The sauce should be the consistency of gravy. Add more beer | stock if too thick or flour if to thin, to adjust the consistency. Taste and season with salt and pepper if needed.