If this newly introduced fish happens to come at the same time as my feeding schedule, they will be eating in no time. If they missed it, they will need to wait for the next one. But if I am in the mood, I will coerce it to feed immediately. They are fed very sparingly in the LFS that is why I think they are really very hungry before they arrived in my tank. The faster that they feed, the faster that they will adapt into my tank.