MMMMMMM.....my thoughts too! if a really squitty younger lamb ....say about 8 weeks, does not respond to worming/fluke drench i would getpoo sample to vet to test for coccy. It can be 'in the pasture' but usually will raise its head when taking on new ground where it already exists, or in dirty buildings/dirty bedding. If an older lamb, say 4-5 months plus or an adult its probably not coccy!