Game Time
Game time passes differently than actual time.
Hours edit
A game hour is equal to 600 seconds (i.e. 10 minutes). So when food or water consumption states X per hour, X is being subtracted every 600 seconds, not every 3,600 seconds.
Seconds edit
The speed at which seconds pass appears to vary by computer. For example, 18 seconds in real life may be 22 seconds in the game.