I've added in a few drops of honey on diced veggies and stir it up at best they eat it at worst they don't. Keep trying there just young and it's probly all new to them. Keep alternating each. I thought mine hated carrots turned out they do eat them but only once or twice a week not everyday.
They can be picky eaters just keep trying eventually they will dive in.
If you feed them pellets try taking them out completely at night and just have there ohpw and fruits and veggies.