I find the wormers direct website helpful, they have a worming calender on there too which advises what to worm for at each time of year but also which ingredients are best for each type of worm. http://www.wormers-direct.co.uk/calendar.html
Pramox at end of March
Equest at end of June
Pramox at end of Sep
Equest at end of Dec
Pick up droppins in your field as often as you can, we do ours daily!
Do a worm count on each horse, you can buy the kit from your local feed merchant.
