Regarding internal fly repellant & the B vites...Humans can take high amounts of B1 (75-100mg) in an isolated form for a few days/weeks to repel insects, but long term taking of an isolated B Vite in humans is not recommended as it can imbalance the system. I would think it would also be true for horses. Out here in Calif., we have seen good results from feeding a garlic supplement like the one Springtime Farms sells. Many of my friends use garlic granules both for the immune system & to repel insects. Hilton Herbs also markets a similar one through Chamisa Ridge. Some horses love it, some don't, but after it builds up in their systems, flyng insects seem to bother less. Of course your hay room & horse smell like an Italian restaurant!!
Kaaren Kaaren Jordan http://kaarenjordan.com
