Sheep management is best approached with an eye to your overall goal.
How you raise sheep will reflect how you manage. In confinement (in a building or corral), semi-confinement (on pasture when grass grows but in buildings or corrals otherwise) or zero confinement (pasture or grass based approach).
As no ranch operation will be like another, no management program will match another. Advice on management practices needs to be approached with a mindset of tweaking for your own operation.
That said, it is far more enjoyable and easier on cash flow to maintain healthy animals instead of treating sick ones. Ideally the goal of sheep management should be to maintain a healthy flock so that treatments are rarely needed and preventative care can be limited to only what is essential.
The more treatments we can eliminate and the less we give needles and drenches the further ahead the flock, the rancher and the bottom line are.
We view sheep management as an umbrella term that could include the following components:
Sheep Care - Having a well stocked toolbox of supplies will help ease your job of sheep care from day to day
Sheep Diseases - Preventing sheep diseases from gaining a foothold in the flock is really the ultimate satisfaction for any conscientious livestock producer
Sheep Health - Having some idea of what sheep health means to you and steps to maintain flock health
Sheep Minerals - what to consider when establishing an adequate sheep mineral program for your operation
Sheep Handling - Having some means of handling your sheep when you do need to perform treatments
Land Management - grazing and maintaining vibrant grasslands for now and down the road
Realize that while we can and should strive for the goal of optimum health in our flocks we won't always be on the ball. There will come times when care is needed and treatments are necessary.
For the most part though, managing the flock can be a low key affair with more work done with pencil and paper than anything else. Keeping an eye on the whole and managing for the sake of the flock versus the sake of individual animals, will help keep things in perspective.
To raise sheep who thrive and have the vibrancy that only healthy animals have we pay a lot of attention to our sheep mineral program while we look ahead to improving land and the quality of the grass.
Many will overlook the land aspect in a management program. Yet the land is what grows your flock. The land, the grass, is what ruminants live on, therefore health and sustainability of land needs to be included in any ranch management program.
If health of the land is not considered alongside health of the animals ultimately one is really just moving in circles and facing a never ending routine of treating animals and maintaining profits for drug companies.
That said, it is far more enjoyable and easier on cash flow to maintain healthy animals instead of treating sick ones. Ideally the goal of sheep management should be to maintain a healthy flock so that treatments are rarely needed and preventative care can be limited to only what is essential. 
Realize that while we can and should strive for the goal of optimum health in our flocks we won't always be on the ball. There will come times when care is needed and treatments are necessary. 
