Capillary refill time is tested by pressing your finger firmly on the gum above the front incisors and removing it quickly. The time it takes for the area to turn from white back to pink is the capillary refill time. Normal refill time is about 2 seconds. If capillary refill time is longer than 2 seconds you should note the color of the mucous membrane and contact your veterinarian.
See Temperature, pulse and respiration in a horse for more information.

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