Give it time, why do you yanks always have to use live. My dat pictured here hasnt eaten for nearly 2 months and im not that worried. Keep the water spot on and try in another week or so, worms might work.
Don't worry, the Dat will eat in the end. I had an Indo that also did not eat for over 2 months, then it just started eating prawn. Just keep putting the food in, it will eat when its ready.
If your really worried give it some live River Shrimp, the movement will get it eating, also worms are good.
Wow, 2 months.... That's a bit long but it all depends of the fish. Although I agree with all of the member's statements, I just want to add that this is not advisable for datnoids 2" and below. I once had a thinbar thats 1.5" and didn't eat a thing for 1 month and then it died on me. Right now, my NGTs are 3" so I'm feeling pretty confident that they can live through a couple of months with no food and just eat whenever they are ready.
I was worried when my dats wouldn't eat too. So I picked up a bunch of ghost shrimp from petsmart and tossed them in...I just made sure there were enough shrimp to go around.
I also fed them frozen brine shrimp without a problem.