There is a lot of variability in how long it takes to ice a horse’s legs, depending on the size, condition, and responsiveness of the horse. For example, smaller horses may take less time to cool down than larger horses. Horses that are more responsive to cold treatment will often be able to cool down more quickly than those who are less responsive. Additionally, the thickness and composition of the horse’s skin can affect cooling time; thin skinned horses may take longer to cool while thicker-skinned horses will typically respond faster.