I have a awesome 10 year old mare that has asthma, but is controlled with medication.  She has recently started losing some run coming from the third.  She is NOT bleeding.  She's in great shape.  Any suggestions?  Pre race stuff?

What cells are in her cytology report?

Vitamin E pure, Bio - Hesperia C/K, Chloropyll, rose hips, Re-Coop, DMG 5000 and a must probiotic /Forco. Give for 90 days straight. With the exception re- coop.

Just curious. Have you had her scoped right after your run

I may or may not apply in your situation, but I put my horse on CEP Daily Lung pellets last year and I was amazed. My horse literally was running a 1/2 second faster, consistently. He doesn't have allergies or anything but he's never had much "stamina" in terms of lungs.