I have one, and it shows no interest in feeding, but I have had it for about 2 months and it looks heathly as can be, but doesnt touch shrimp or anything else I leave on the bottom next to it.
I encircled it with pea sized peic of shirmp, and watched it crawl right over them.
How should I feed it? Of course I dont want to foul my water so when I do feed it, I watch to see if it eats. I dont want to leave uneaten food in the tank.