Oh Laura, I know how hard that must have been. But the pictures in themselves show what your love and compassion did for them. Cats are more understanding than people sometimes. They know what you did for them, and they love you for it.
It will never get easier.. BUT please take satisfaction in knowing they are in great hands, that they are getting food/water/attention/warmth which is FAR MORE than they had before you saved them, and they will go on to live long healthy lives all because YOU cared about them! *HUGS* Katie