You can tell the age of a baby pigeon by its growth and behavior. Check the pictures of baby pigeon growth shared in this article and compare your pigeon baby's growth with theirs to know its age. Also, look for the below factors. 1-3 days: Small, has only yellow furr, no feathers, and eyes are closed. 1 week: Eyes are opened but have no pin-feathers. 1-2 weeks: Pin-feathers on some parts of the body but not on the head. 3 weeks: Pin-feathers on most parts of the body and can slightly walk. 4 weeks: Entire body is covered with feathers and it can walk well. 4-6 weeks: Still has some pin-feathers on the face, can make short flights, and parent pigeons still feed sometimes. 6+ weeks: Flies well and eats on its own.