The two naked baby birds had Feathers covered the Body

This is how dna controls all lives. The parents only need to provide warmth and food. Give them time, the body and feathers will stiffen and then they will start to fly and find food. The cycle repeats. 

Unfortunately, these baby birds and the mother bird were eaten up by the neighbouring cat after few days. The mother bird tried to protect the children but failed. 

In the natural world, fittest survives. 
The same principle applies to us. The city is like a jungle, fittest prevails.