Maintenance - Adult horse not being exercised
Light work - Adult horse being lightly exercised for 1-3 hours per week
Medium work - Adult horse being moderately exercised for 3-5 hours per week
Heavy work - Adult horse being intensely exercised for 5 plus hours per week
Retired/Senior - Aged horse needing additional nutritional support
Spellers - A horse not actively exercised or recovering from injury
Empty and Early Pregnant Mares - An empty mare preparing for breeding season, or a mare in the first or second trimester of pregnancy
Late Pregnant Mare - A mare in the last trimester of pregnancy
Lactating Mare - A mare with a nursing foal at foot
Stallion - A stallion currently performing breeding duties
Weanling - A non nursing growing horse up to 12 months old
Yearling - A growing horse over 12 months not being exercised

Excitable/Sensitive to Grain - Highly energetic, reactive, and often sensitive to their surroundings. May be quick to startle or easily agitated.
Normal/Sensible - Balanced, calm, and generally well-behaved. They are responsive without being overly reactive, adaptable and easy to manage in various situations.
Lazy/Quiet - Mostly calm, steady, and often unflappable. They are less reactive and more relaxed, preferring a slower pace and requiring encouragement to be more active.

Hard Keeper - Difficulty maintaining weight and body condition, even with ample feed. Hard keepers often require more calories and high-quality forage to maintain a healthy weight. They may have a higher metabolism or underlying health issues that contribute to their need for extra care.
Normal Keeper - Maintains a healthy weight and body condition on a standard diet without requiring significant adjustments. Normal keepers have a balanced metabolism, making them easier to manage in terms of feeding and overall care. They are neither prone to weight loss nor excessive weight gain under typical feeding conditions.
Easy Keeper - Maintains or gains weight easily, even on limited feed. Easy keepers are often prone to obesity and may require a more controlled diet to prevent weight-related health problems like laminitis. They typically have a slower metabolism and are efficient at converting feed into energy.