and how do i no wen hes hungry?
There is one sure way to know when a lion is hungry - when he is alive.
You can make a feeding stick out of a piece of airline tubing, impale the silverside on it and wiggle it in front of the lion. What kind of a lion is it, and how big. If the silverside is too large, the fish can choke on it, if it is too small he may not bother (not likely, but could happen). Good luck!