As my focus is on animal rescue, I’ll start with the most obvious reason…overpopulation. Million of dogs & cats of all ages & breeds are euthanized every year or suffer life as a stray. Animals shelters are overwhelmed with the number of homeless animals brought in every day, leaving the fate of healthy animals to die. And strays die of starvation, harsh weather conditions, disease, hit by cars, or the cruel abuse of humans.
A spayed or neutered pet will live a healthier life. An unspayed female cat or dog has a greater risk of developing mammary tumors or uterine infections than if she is spayed before her first heat. Altering male cats or dogs before they are six months old prevents testicular cancer & prostate disease. And all dogs & cats should be fixed at any age to prevent unwanted litters.
Last, but certainly not least, a spayed or neutered animal has less behavioral issues and I recently read that altered pets are more focused on their human families. An ASPCA article stated, “unsterilized, unsupervised males roam in search of a mate, risking injury in traffic and in fights with other males. They mark territory by spraying strong-smelling urine on surfaces. Indoors, male dogs may embarrass you by mounting furniture and human legs when stimulated.” Enough said!