I would by no means consider it a goner, but you should def determine the cause and possibly even have someone baby sit it while you correct whatever the situation is.
I've got frog spawns, hammers, clams, and other corals. All look great. I may have had him too high up and he wouldn't open up very much. Moved him lower and he looks better.
I don't direct feed, I have frozen coral food cubes that I mix with my other cubes that I feed twice a day along with some phyto about every other day.