@tanza:
Unless they are sick, they will eat when hungry, they will not starve themselves…......Mine have always eaten in 2 minutes or less..... if they don't, I know they are not feeling well.
All of mine have been the same way. Food is down, it is GONE! My Lady used to eat so fast, once when I had her at a boarding kennel she got fed twice a couple of times, since they couldn't believe they had fed her. Turned around, it was gone. They soon learned that she just ate quickly.
I also feed twice a day, plus he gets his roller ball if we go out. If any food was ever left, I would immediately know he was sick! (or suspect there was something wrong with the food if it was a new package)