I have had my 3" indo datnoid for awhile and he will go after bloodworms and live feeders until he is obese but won't touch pellets, Ive read a few things but any specific techniques to get them on pellets like NLS? Also about a week ago he started getting a dark face and now it pitch black all the time, I have been changing some tank mates around is he just being territorial? He is acting normal and eating as veraciously as ever.