Neutering, or castration, is the surgical removal of both testicles in male dogs and cats. (risiusfamilyvet.com)
Neutering involves removal of the testicles of male dogs and cats and is called castration. (vcahospitals.com)
Although the surgery for either sex can be called a neuter, most of the time neuter is the term used for the surgical removal of the testicles of a male dog or cat. (sbhumanesociety.org)