Thank you!! They are stalled mostly and turned out in the arena (our pasture is still new and growing grass). My husband's father is home 24/7 so he cleans up after them literally multiple times a day. Picks poo up in the arena daily. Stalls cleaned daily, water buckets emptied daily or every other day. My horse is 18yrs old, my husband's is 16. When I worm them I always change it up...Everytime, I use a different wormer. Is there anything else you would need me to add?