I bought a gold clown knife earlier today and it seems very malnourished. It is very thin, I can see the outline of his skeleton almost. I don't know that this is normal. He is only 4ish inches. It is in a tank with 2 JDs, 1 midevil, 1 gt, one small mayan, and 2 small jags. What is an easy food to give it that it will readily take and eat a lot of. I want to bring it back to health!