Clyde Frog, Monster, And 2 un named toads!

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Heres my 4 fire belly toads! I know I at least have 2 males(clyde frog and one of the un named toads) Clyde frog had him in a grasp and the other barked at him and flipped out ha.. Anywho, clyde frog has been brown(or dark green) for probably about a week now(hes normally lime green) Ive heard its because hes shedding? Can they have trouble shedding? And how long does it usually take for them to shed?

Heres a updated picture from today!