I've never had to starve a fish to get it eating anything I give it. It takes time and patience. Start out feeding the most nutritious food it will eat, variety is important, and over time you can slowly introduce other foods like pellets into the mix. This method always works if you keep at it and use some common sense. I have many wild caught fish including rays, dat, aro etc... and have gotten them all onto the food I want them eating. For your baby aro, try crickets and live red worms. Bloodworms work good too, but not great for growth. You'll get the best growth with a combo of tilapia, shrimp, scallops, chopped nightcrawlers, and occasional pellets for vitamins. I would not and do not feed pellets daily to any of my fish. The fillers (wheat, soy, rice, ect) are not good for your fish as a daily staple. Feed your aro twice a day until it's about 24"