There are many professional service providers and advisors that provide worm egg-counting, drench resistance testing and advice to sheep producers.
Some are government laboratories, others are commercial laboratories, private service providers or veterinary consultancy practices.
These service providers have highly trained staff that will give you the services required to improve worm management on your property.
You should familiarise yourself with a provider nearest to your farm and with such things as the range of services they provide and the sampling procedures they require. For your convenience, providers and the services they provide are listed by state.