Until now gonadectomy has been the only option for
permanent sterilization of cats all over the world, but
this is the first report of an androgen-eliminating nonsurgical
method of sterilization of male cats. Due to its
permanent reduction of testosterone, calcium chloride
would be used in cases where elimination or reduction
of sex-based behavior is desired, such as for family pets
and in control cat programs. The primary practical
advantages of calcium chloride over surgery are affordability,
elimination of the need for anesthesia, sterile
conditions, and recovery care. It is easy to inject since
unlike previous attempts at sterilizing agents, it is not
rapidly caustic to the skin; little training is required and
complications are avoided if any spilled solution is
wiped away. The primary disadvantage is slow onset of
action (4-6 weeks) and the level of discomfort during
injection, which we hope to address by calibrating injection
volume more specifically in near future.