That is what we use to do. Keeping animals in singular pens whilst being treated. Waste of time and money all in all.You can treat it with Amaverol but it doesn't work quickly, isn't that cheap and needs several applications. We used to treat it but now let them grow out of it, it's the same outcome but for much less cost and effort.
Male Holly - male hollyYears ago when we still milked we had a spell of ringworm. Someone told us to use Zinc blocks. Since then we have always had them available to the stock. Still might get an odd one but, touchwood, not too bad at all. Always remember my Grandad having a bunch of holly hung up in the byre and that was to prevent ringworm.