Flowerhorns are recovering from shock

Now dark color they had is gone. But still they look battered. Black dots are visible and also light red color in belly area. Also I think their appetite has returned. I haven't feed them since I brought them home except for tiny tuna fish piece for each. those tuna pieces were there for last 2 days and now they are gone, probably eaten.

I need to find a quality fish food for them. Additional I planed to feed them tuna, chicken and hard boild egg york. At least in few weeks they will have their colors back at least.