Kroot have the fieldcraft trait which gives them a +10 to Concealment, Shadowing and Silent Move, they have access to buy both Concealment and Silent Move up to a +20 by Rank 3 but they don't get Shadowing at all. Whas shadowing just left out of the Kroot skills? Should ranks 1, 2 and 3 have shadowing listed on each rank increasing each time as they do for both silent move and concealment?

I included it as a starting skill
Rank 2: +10
Rank 4: +20

Did you see they also gain very few Sound Constitution Talents?