Good morning

I wanted to ask you a question ...

A moment ago I killed a dragon blood, I have been able to collect their bones and scales, but I have not absorbed his soul.

This is a bug or the souls of dragons blood can not absorb.

Thanks for your answers

Are you sure you didn't miss the message that you got the soul?

Its a bug, its happened to me twice on the 360. All i can say is just forget about it and move on with your character.