Chick embryos are frequently used as animal models when researching the developing heart. In the past, every attempt to induce complete transposition (the combination of concordant atrioventricular and discordant ventriculo-arterial connections) failed in chicks, suggesting that it might be impossible to develop a chicken model for this malformation. We demonstrate, to the best of our knowledge, the first well-documented case of complete transposition occurring in the chick.