Question: signs a mare will foal soon?
Answer: Udder distension begins 2-6 weeks prior to foaling.
Relaxation of the muscles of the croup 7-19 days prior to foaling; relaxation around the tail head, buttocks, and lips of the vulva.
Teat nipples fill 4-6 days prior to foaling.
Waxing of the teats 2-4 days before.