If I had a Dovii.. I'd feed it strictly on babies and kittens.
Seriously, though. You may want to try a "feeding stick". Esstential a stick with a little thing to hold food items, such as krill, shrimp, an impaled pellet, etc. Put something on it, and drag it through the water. It gives the Dovii, or any fish, the illusion the food item is alive, which usually causes them to eat it. Over the course of a couple days, weeks, whatever, slowly move the stick less and less, until it's standing still. Then the "trained" fish should take whatever it is you want like a 'normal' fish would. Thats what I did anyways, and it worked great.
But for feeders, if you can't ween it off of them, try gutloading them with your desired food items. Pellets work best, as they're less expensive..
