Scopoli’s shearwater (Calonectris diomedea) is a pelagic seabird that breeds on small Mediterranean islands. During the breeding season, adults return at night to the colony to feed their chick while feeding themselves during the day. Most species of Procellariiformes, as shearwaters, feed their chick with highly nutrient stomach oil, allowing chick’s survival for several days and toleration of irregular feeding attendance. It has been shown, by T-maze tests, that parents are able to recognize their own chick by smell. But how will they behave in the presence of a foreign chick? They might respond by feeding the adoptive chick as their own, or on the contrary provide insufficient or no food to it. To test these possibilities we cross-fostered 14 chicks and we measured their weight and bill length once every three days for a nine-days period. Another 14 chicks, remained in their nests, were measured with the same schedule to serve as control group. There was no significant difference between the control and the experimental group, as both showed a normal weight increase and similar bill growth. Hence, we showed that the exchanged chicks received the same care as control chicks. Obviously, these results do not prove nor exclude the lack of individual recognition, but confirm that adult birds adopt any chick in their nest. Further studies are required to test the importance of the olfactory stimuli and other cues on chicks recognition.