I have bunch of lions 3 fu manchu and a fuzzy dwarf they were awsome and I never had a hard time feeding them I will just drop the food on front of the power head and they will eat it while it is still floating and I can also hand fee them I will just hold a piece of food and wiggle it in the water
but what I enjoy the most is when I feed them with chromis or damsel they love it. Live feeding is much fun to watch than feeding them with frozen. 2 months ago I try feeding them with one of my peppermint but they never had a chance to take bit of it and it is still alive until now hidding in rocks but I am still waiting for the day when it gets eaten.
My only advice is when you buy a lion make sure it will eat frozen.