Has anyone used it on their broodmares? Heard about it on the mwh podcast and am wondering!

I did about 6/7 years ago. It worked wonders on an older mare that had an injury while carrying. She and the foal made it through a very difficult time and she milked better than my other two mares and had a decade of years on the two. 

I use it in two of my hauling horses and will keep mine on it if they are under stress. 

My bloodlines are high-stress, lifeline seems to help them. 

Bump

Yes. It is amazing for broodmares. I have had a couple customers that board at my place use it. The babies where born thriving, mommas kept weight on, looked great, produced good milk. Even through weaning it really helped them as well.