They say that one thing that distinguish us from animals is that we have opposable thumbs. Opposable thumbs means that our thumb can bend and touch all the other fingers. So we can hold things, small things, we can eat with one hand, and we can do many things animals cannot. There are of course many animals with opposable thumbs, but they cannot touch all their other fingers with their thumbs.
Try picking up a single grain of rice, or lentil, or a KFC leg with your thumb and index finger and tell your dog, “See … I can do this and you cannot!”