Urgent Care :: rescued turtles; shells

[leopard167]

i rescued these turtles 3 days ago. i have no idea their past or age. a lady at petco told me they were shedding.
curious to what experienced turtle owners think of and advice of Leela's and Turbo's shells.
are they healthy ? unhealthy? too dark? and if so what can and what wont help.
really appreciate all thoughts and opinions of the shells.

thanks everyone

Leela and Turbo:

[steve]

Hard to tell from the pics, they look good though. The last pic might be showing some issues (the edges around the scutes and white spots), any chance you can get a larger/clear pic?

[leopard167]

i really wish i could my dog ate my digital cam a cpl wks ago.