It is wise not to depend on any single indicator of foaling, but instead to monitor all the signs of impending birth. Other signs include a softening of the muscles over the rump and along the tailhead as the pelvic area prepares for the stretching necessary for delivery. The vulva itself often becomes swollen and elongated. Many mares will show changes in behavior leading up to foaling. Most mares foal between 10 p.m. and 4 a.m., so a normally good eater who skips her dinner may be close to delivery.
Mares prefer a quiet, low-lit area for foaling, one that is free from excessive noise and activity.
If you are planning on videotaping the event or want some light present, it is wise allow the mare to become accustomed to the lighting by leaving the stall lit at night for a week prior to foaling. It is also recommended that mares foal on straw rather than shavings. Shavings tend to stick to the mare's vulva and can be drawn back in as the mare and foal struggle during the birthing. Shavings also tend to stick to the foal and allow bacteria to more easily enter the umbilicus. Foaling is a natural process, and many foals are born without human assistance.