I have a small flock of Dorset sheep that are just 'pets and mowers'. I need to worm them, usually a friend of mine does that for me. I'm quite confused by all the makes on the market. Which would be a good one to use at this time of year? They are on pasture that my two ponies go on at times as well. I see from other messages that is advisable to move them onto fresh pasture 24-48 hours after worming. My other field has quite a lot of grass in at the moment and I am reluctant to move them their, as they would probably get the scours and attract the flies. Any advice would be most appreciated. Thank you.