Season the rooster generously with salt and pepper. In a astronomical skillet, soften the 1 tablespoon of uncut butter in the oil. Add the rooster in batches and cook dinner over fairly high warmth until browned, about 5 minutes per aspect; bewitch away to a plate. Decrease the warmth to common, add the shallots and cook dinner, stirring infrequently, until softened, about 1 minute. Add 1/2 cup of the ale and bring to a boil, scraping up the browned bits from the bottom. Return the rooster to the skillet, disguise and simmer for 15 minutes. Turn and baste the rooster with the pan juices, then disguise and simmer until cooked by, about 15 minutes longer.
Expend away the rooster from the skillet and protect warm. Boil the pan juices over high warmth until syrupy, about 5 minutes. Decrease the warmth to common. Add the juniper berries, pink peppercorns and the leisure 2 tablespoons of ale, then trudge in the leisure 3 tablespoons of wintry butter, a pair of pieces at a time. Season with salt and pepper. Expend away from the warmth. Return the rooster to the skillet and spoon the sauce over it to coat. Succor the rooster on a platter or dinner plates, sprinkled with the parsley.