The tricky thing about dwarf lions is feeding, they always come in eating live food only and there is no guarantee you will be able to get them to take dead food. Even people that do get them eating dead food it can sometimes be short lived, and they will never eat enough from the water column to sustain long term, So if you do get the dwarf to take dead food you must target feed, so keeping them long term is a bit of work.
I have 2 fu manchu's and one ate dead food as an addition to her diet for a few years, but for the last year or so hasn't taken any dead food. I've found for long term success a combo live/dead diet is best, my lions get a majority of live foods. The fuzzy is the easiest to convert and some have had long term success feeding a dead only diet, I do say some because most do not. The dwarf lions are a tricky bunch and also are a challenge because of increased incidents of coming in with internal parasites, they have a very high mortality rate.
Best chances of success would be to have a qt tank to treat for internal parasites and work to convert to dead food in a tank alone before introduction to the dt. Also be ok with feeding them a live diet for their entire life just in case you are unable to get them to eat dead food.