Sorry for the loss. My 10" IT's dead body had a bloated tummy, but I know he didn't have a bloat 8 hours before he died. In fact he hadn't eaten for several days, and his tummy was actually sunken a little bit. So I think dats have a bloated look after death.
So, do you still think it is safe to have small dats with bigger ones? I will be putting a 2.5"-3" NTT into a tank with two 10" IT's soon...