I plan to move all my sheep around in the next week or so, all the ewes (pregnant and non-pregnant) will be going together, and my 3 resident boys (ram and 2 wethers) will be put in with my 2 new rams. I've had all the sheep for some time now and they are in various groups in different fields.
They were all wormed with Cydectin on 8th Feb; should I re-worm them all again before I put them together? My first pregnant ewes are due to lamb from 1 April onwards. I'm just a bit wary of over-worming them with the risk of building up resistance - I've wormed them more than I ever have before due to the problems I've had this year.