Sorry to start another thread on this subject, but I really don't know what to do I know that it is now thought that you shouldn't just give a 9 day course (although the manufacturer recommend this), but that you should do the 28 day course. However, if, as vets say, you could pick up the EC at any vet visit, does this mean you have to give buns a 28 course after every single visit to the vet - this could mean you were giving it a lot in some cases - I'm really confused as to what is the right thing to do. I've only given my two a 9 day course this time - they are due to have myxi vaccs again in December and therefore would normally give them another 9 day one then normally. Please help?!!:?