Research tested the bouba-kiki effect in baby domestic chickens (Gallus gallus), where people associate the word "kiki" with sharp shapes and "bouba" with round shapes[1][2]. In the first experiment, 3-day-old naïve pups listened to the sounds "kiki" or "bouba" and significantly preferred the sharp shape for "kiki" and the round shape for "bouba"[1][2]. In the second experiment, 1-day-old chicks approached a video with sharp moving objects for the sound "kiki" and for round ones for "bubble"[1][2]. These findings suggest an innate mechanism for matching shapes to sounds in a precocial species shortly after hatching[1]. The effect was manifested in young children without previous experience, which is confirmed by two experiments[1]. The results show that this behavior is not exclusively human[1][2].