I ran across this on another forum and thought it had some really good information on it. I know most of us know about the common parasites, but I found the section on neck threadworms very interesting. I'd never heard of them before! There used to be a mare out at the farm that had chronic itchy skin, extremely bad in the summer. We gave her medicated baths, soothing creams, nothing worked! Now I wonder if she just needed the right dewormer? Anyway, just thought it might make some interesting reading

Equine Parasites