There are no behavioral differences noted between pets neutered at 8 weeks of ages versus 6 months of age. Pets neutered at 8 weeks of age, however, do have a lower metabolic rate, increased body weight and less development in their secondary sexual characteristics. To date, the only way to prevent pregnancies in pets permanently and help prevent various cancers and infections is with spaying and neutering. Ferrets, rabbits, guinea pigs, rats and chinchillas can safely be spayed and neutered and should be for numerous health benefits for them as well. They are also prone to mammary tumors.
Female rabbits are especially prone to uterine and mammary cancer if left unspayed.