An early age Spaying/Neutering of cats
The authors of the next 2 articles studied long-term effects of pediatric gonadectomy and concluded that gonadectomy can be safely performed in cats under 6 months of age. These articles are followed by reports of 2 studies of cats neutered at over or under 24 weeks of age. The authors found no increased risk of disease or other health problems in cats neutered early.
Long-term risks and benefits of early-age gonadectomy in cats. (PDF, 158 KB)
Highlights:
Studied 1,660 cats adopted from shelters
Early-age gonadectomy beneficial in male cats
Asthma, gingivitis decreased in both sexes
Gonadectomy safe in cats under 6 months of age
Results of that study also suggest that prepubertal gonadectomy may result in some unidentified protective effect on the urinary tract, compared with traditional-age gonadectomy in some cats.
Long-term outcome of gonadectomy performed at an early age or traditional age in cats. (PDF, 270 KB)
Highlights:
Health status of cats monitored for 3 years
No increase in physical or behavioral problems
No increase in infectious disease in either group
Early-age neutering did not increase problems
All this information was taken from American Veterinary Medical Association’s website.