Inbreeding and founder effects in companion animal breeds cause severe hereditary health problems. Genetic diversity programs improve breed health and reduce suffering across millions of animals.
Companion animal breeding practices have created a hidden welfare crisis through severe inbreeding and selection for exaggerated traits. Thousands of Cavalier King Charles Spaniels suffer from painful syringomyelia. Millions of brachycephalic dogs struggle to breathe normally. Genetic diversity improvement programs and breed standard reform represent the most powerful interventions available for these welfare problems.