Building on previous scholarship on “genetic capital” and the politicization of animal economies, this paper examines how animal breeds and their transnational movement became geopolitical issues in late seventeenth- and eighteenth-century Europe. In particular, it examines how the French government’s efforts to emulate English and Spanish wool production, and to overcome the economic advantage stemming from its rivals’ superior sheep breeds, intensified in the wake of the Seven Years’ War (1756–1763). Despite bans on the exportation of live sheep from Britain and Spain, the French strove to improve their flocks through illicit imports and diplomatic agreements. These efforts culminated in the 1760s, as the Bureau of Commerce began to collaborate with agriculturalists, naturalists, diplomats, and smugglers to bring superior breeds of sheep across the Anglo-French maritime border and the Pyrenean frontier with Spain. These projects developed in tandem with new conceptions of the permanence of race and breed, according to which animals would retain their characteristics in new climates and environments. Combining perspectives from economic, agricultural, political, and cultural history, this article uses the concept of animal mercantilism to open up the geopolitical stakes inherent in understandings of animals, race, and climate.