Barriers to spay-neuter access perpetuate animal welfare harms from overpopulation and reproductive disease.
Access barriers to spay-neuter perpetuate welfare harms at both individual and population levels. Intact animals in households without resources or access for sterilization produce unintended litters whose offspring enter an already overcrowded shelter system. Female cats and dogs that go through repeated heat cycles and pregnancies face health risks including pyometra and mammary tumors. The welfare costs of shelter overpopulation — overcrowding, disease, behavioral deterioration, and euthanasia — flow downstream from insufficient access to sterilization services. Treating spay-neuter access as a public health infrastructure issue rather than an individual responsibility enables more effective population-level welfare improvement.