One mare owner wonders if it’s okay to breed a mare in her mid-teens. This podcast is from the Equine Life Stages: Stallions and Mares Q&A audio event, sponsored by Merck Animal Health.One mare owner wonders if it’s okay to breed a mare in her mid-teens. This podcast is from the Equine Life Stages: Stallions and Mares Q&A audio event, sponsored by Merck Animal Health.12/17/2014 15:00