Then perhaps it is not BJD. Could be some other bacteria infection, flatworms, or as mentioned previously euphyllia just sometimes lose a head here or there for unknown reasons. Frag it off.Actually I did pull out the coral that looks the worse and didn’t smell bad. It really just smelled like tank water. Usually that bad smell is pretty strong and it didn’t smell like that. There is a procedure for KFC in tank, you just have to be a subscriber to get the procedure.