These procedures should be used as soon as colic is suspected. Additionally, information regarding the status of the horse can be given to the attending veterinarian. A horse at rest that exhibits a heart rate greater than 50 beats per minute may be in moderate to severe pain. Listening for a lack of gut sounds over the flank area, which may suggest problems. Evaluating mucous membranes.
Gums normally are pink and moist.
Purple, dry gums indicate circulation problems that suggest severe colic. Assess capillary refill time by pressing on the gums and monitoring the tie for color to return. Normally, color returns within a couple of seconds, at most. Longer times may suggest increased severity of colic. Also, short periods of light hand walking often help to relieve low-grade pain.