Shrimp come with diff.genes may be yr SSS have SS genes hence a few babies are born S-SS. Even my shrimps are SS-SSS and I have A-S babies but I'm happy doesn't matter what grade the babies are born all babies are welcome.
What is yr tank temp.coz adult losing white color is due to high temp.or stress or a bacterial outburst.
I used Shirakura chi ebi (baby) powder (food) in the past
Now I have Shrimpking baby food (a friend hobbyist attented the Shrimp int'l Hannover Germany and bought me some delicious goodies for my shrimp http://www.garnelenchampionat.de/ambassador/
The babies and adults seem to love both food.