Nutrition is scored out of a maximum possible 200 points. It accounts for two-fifths of overall Mood. Players can increase their Genopet's Nutrition score up to its maximum of 200 by Feeding their pets Food items.
Feeding is the player action which can increase Nutrition. Nutrition decays an equal amount every hour starting from the time of the last successful Feeding action, equivalent to 50 points every 12 hours. When Nutrition is 0, a Genopet's Mood is effectively capped at 60% of its possible maximum.