Some goats have extremely low fecal egg counts - zero. These goats are parasite resistant and rarely need to be wormed. Anything below 250 is considered exceptional. Obviously goat breeders like to see these low numbers and many of us tailor our breeding program to raise offspring with these characteristics. But, is it what we the industry really needs. Is it what we really want?
Recently, I had a conversation with a fellow breeder that I respect. He has top quality goats and also places considerable emphasis on low numbers in the fecal counts. During the discussion, he disapprovingly mentioned some breeders seem satisfied with goats that have higher egg counts although unaffected by the parasite load they carry. He was surprised to learn I agree with these other breeders to some extent.
Whether it is better to have resistance as opposed to resilience is an interesting question. As said, we breed for resistance, but we also breed for resilience. We believe both are important. Someone will undoubtedly point out that no eggs means no worms. This is the position my friend takes. In fact, he says owning goats that carry worms means you are infecting the rest of your herd as the droppings are spread through the pasture. It is a sound position. After all, increased parasite levels will definitely infect the others.
So why do we care about resilience? Wouldn't it just make sense to stay focused on goats who don't have parasites? We don't think so. It reminds me of the 20 year old, never sick a day in his life, who suddenly dies of a simple virus. Over the weekend, I listened to one of those medical radio shows. The physician talked about increasing numbers of adults contracting whooping cough. He explained the vaccines given as a child wear off and the immune system weakens when it is not periodically challenged.
Sooner or later the goat with a zero parasite level is going to come into contact with a new strain of parasites it never encountered before. When it happens, the animal whose immunity has never been fully developed will not have the time to build a working immune system.
While we are big advocates of objective tests to measure attributes such as the buck forage tests. One of our criticisms of these tests has been the lack of resilience testing. We have suggested tests in which parasites are introduced to the participants to determine the ability to ward off the attack. So far, we are not aware of any testing facility that has a resilience test.
One of the objections posed by test facilities is breeders of expensive, registered stock will not be willing to participate for fear of the animal dying. Our response is the tests are designed to objectively prove that what is being sold is truly there. Sort of like, "put your money where your mouth is." If you hear of a facility conducting resilience tests, send us an e-mail and let us know.