Preserving the diversity of this domestic livestock is insurance for future trends and developments. We may need to call upon these breeds for specific traits to enhance the current industrial stocks, especially for characteristics like longevity, disease resistence, adaptability and structural soundness. As well, we cannot overlook the importance of consumer demand and the fact that it tends to operate in 25-30 year cycles. Most of the old domestic farm animal breeds are docile, easily managed, and attractive to look at. In other words they are fascinating and fun to be around.
Different breeds have differing personalities.
This is the personal aspect of keeping an endangered breed.