Many in this field of study rallied around this “hygiene hypothesis,” positing that the immune system is like a muscle and needs periodic exercise to be strong...
Authored by Joel Salatin: Bugs, viruses, and sickness—these maladies creep into countless conversations as people wrestle with the question: How do I strengthen my immune system?

The overriding answer from the conventional pharmaceutical and vaccine industry is that functional wellness comes from a pill, a needle, or some kind of medical treatment. As a farmer with thousands of animals and no vet bills, I can attest that the overriding conventional notion in the livestock industry is that a sick animal is apparently pharmaceutically disadvantaged.
I have a completely opposite paradigm: A sick animal testifies to my own mistakes. Maybe I chose weak seedstock. Over many decades of livestock farming, I’ve had half a dozen economically significant sickness outbreaks across various species. Every single time, the problem was my fault. Hygiene, diet, stress, discomfort, and toxins. An animal can get sick for many reasons, none of which is because it was medically deprived.