Imperial Stout Aged in Buffalo Trace Bourbon Barrels with Spices A new adventure awaited our brave pterodactyl and turtle dudes-- a snarling mongrel stood in their way to freedom! What else to do but woo it with friendship? With their powers combined, our dino friends concocted a smooth, dark imperial stout with cacao nibs, cinnamon and brown sugar. Aged in Buffalo Trace bourbon barrels, this Prehistoric Dog variant will go down in history as one bodacious brew.