A fourth House Finch bird hatches and competes for food

I've been watching two House Finch birds diligently make a nest and then lay 6 eggs. The female bird has been patiently incubating the eggs for the last two weeks and three days ago the first two chicks hatched. During the next two days, two more chicks were hatched with the fourth one just hours ago. Take a look for those who are interested!