To be honest I think mine does. He comes off the glass and swims with my danios when it's feeding time. Half the time I mistake him as one of them. I do not know if he is actually eating it but he appears to be.
Edit to add: I offer flakes, frozen brine shrimp, freeze dried blood worms, and algae discs too not all together at one time I just vary their diet. Had my oto for over a month now and he seems happy and healthy.