Time budgets differ in horses during continuous and space-restricted rotational grazing.

The research article examines the impact of two types of grazing, continuous and space-restricted rotational, on horses’ body weight and behavior patterns.

Objective and Study Design

• The study’s main aim was to assess how different grazing techniques influence horses’ body weight as well as their time budgets, which is an indication of how they allocate their time to various activities throughout the day.
• The study involved a comparison of two groups: one assigned to space-restricted rotational grazing (SRG) and one to continuous grazing (CG) over a period of 42 days.
• The SRG group had eight mature geldings and mares grazing in an area designed to provide 80-90% of their mean energy requirement for a week. After each week, the horses were moved to a fresh area.
• The CG group also had four horses, who had continuous access to a fescue pasture offering more than the maintenance energy requirements.

Methodology and Measurements

• The researchers carefully monitored and recorded the horses’ behavior patterns, including grazing and standing, regularly on three days each week.
• These behaviors were tracked every six minutes throughout the day.
• Horses’ body weight was recorded every seventh day after they had been withheld food overnight. This was done prior to the horses being turned out for the day.

Key Findings

• The results of the study showed a direct relationship between the type of grazing strategy and the horses’ behavior. Notably, grazing and standing had an inverse relationship — when one increased, the other decreased.
• The proportion of time allocated to grazing varied according to the type of grazing technique. SRG horses showed more grazing time than CG horses during the second and third weeks, but this finding was reversed in the last three weeks of the study.