Castration (orchidectomy), which is the surgical removal of the testicles, can have various side effects on the dog’s behavior (Adobe Acrobat PDF)– for example, reducing the dog’s interest in activities such as roaming and urine marking. Neutersol, by contrast, may not reduce the testosterone levels in the dog and thus may avoid these side effects. Castration also requires general anesthesia and alters the appearance of the dog, both of which Neutersol avoids. The potential side effects of Neutersol are generally short-term.
The FDA granted approval for Neutersol in March but just announced it on Monday when the ruling became effective. Read the news coverage by Reuters or the AP (via MSNBC).
Neutersol is a product of Addison Biological Laboratory, a private Missouri-based company.