The two chicks, TT and JW, are doing quite well. Both are nice and plump and are starting to loose their darker down and are beginning to grow their pin feathers. Pin feathers or otherwise known as "blood feathers" is a developing feather on a bird. The feather is rolled and protected in a tube-like shaft that contains blood vessels, which nourish the feather's growth. 

The top two photos have JW on the left and TT on the right. 

The bottom photo is a close-up of TT. You can see the development of the feathers. In the close-up of TT you will notice the deep red eye color. As the osprey's grow into juveniles the eye color will change to an orange-yellow to yellow once they become adults.