Flower Horn will always look better as adults then they do as young juveniles. Feed him a heathy diet of NLS or Hikari and two or three times a week you can throw in some frozen bloodworm as a treat. If you have had him for 2 weeks and he is still acting shy check your water conditions. If your water conditions are not right that can cause him to act skittish. Whats your PH? Nitrates? Temperature?