Help !! Dommino not doing well

[Captainhemo]

Can a " really big scare" make them lose their color like that ? I have never seen this before
They still arent themselves, but seem to be doing a bit better as time goes by. Seems very strange . It's almost like they get better w/o the main lights on , then for some reason are suddenly scared of the lights. Not sure
what could have happened to start this though

I bought them at the very same time and one was quite a bit smaller than the other, they seem to have an " understanding" of who's bosss and it seems to work most of the time. Once and a while the larger one will chase the small one away to the other end of the tank but nothing more. Alot of the time they are together within an inch of each otter