temperature can reach 102° F and
still be considered normal.
Mucous Membranes and
Capillary Refill Time (CRT)
Evaluating your horse’s mucous
membrane color and moistness
along with CRT are measures of
your horse’s hydration status and
Lift your horse’s upper lip so
you can easily see his gums, which
are his mucous membranes. First
observe their color. Touch the
gums lightly with your finger to
assess how moist they are.
To measure CRT, press on the
gums with your finger for a few
seconds. Lift your finger. The
gums will first be pale and then the
pink color will return. Count the
seconds it takes for the gums to
return to their original color.
What’s normal: Normal
mucous membranes for an adult
horse should be pink to light
pink and moist. CRT should be
two seconds or less. These values
are the same for newborn foals.
Examples of abnormal mucous
membranes include white, gray, or
dark purple gums.
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