If the area around the pupil looks similar to a road map we are not treating. If the same area is white or a pale yellowish looking they are treated. I was told that a researcher from Auburn was putting together a picture chart with different looks at this area. Producers could compare...
In the south we are seriously looking at the area around the pupil before worming sheep and goats. Seems there are those individuals that can remain productive without constant parasite control program.