Short Answer
According to the AVMA and the VTF, the ideal age range for altering a Maine Coon falls between 14 weeks and 5 months. This timeframe is the most researched and presents the fewest risks. However, the optimal moment for spaying or neutering can vary based on your cat’s health and other factors. The decision may also involve trade-offs and considerations, which can differ for male and female cats.
More Information
There are many subjective topics when it comes to cats; for instance, feeding, when they should leave their birth home, and altering. On animal forums, asking “When should I alter my cat?” rarely leads to consensus. Common responses include:
“..I did it at $x months and my cat has been fine..”.
Or…
“..My Vet said do it at $y months to prevent urinary infections..”.
These 2 answers are not wrong, but they are not fully informed. They are based on personal experiences and veterinary opinions.
Limited Studies
The issue is that cats are not well studied, and when studies exist, they often use small sample sizes. Veterinarians, while experienced, may also have limited data to work with. This lack of research leads to unclear answers to simple questions. Even veterinarians must sometimes guess confronted with limited researched information.
Our cattery values data-driven decisions. So, what does the data say about altering cats? Can we go beyond veterinary opinions?
…not so fast
In Nutrition Research Reviews at Cambridge, published in 2020, the complexity of this topic is acknowledged:
There is a considerable disparity among veterinarians regarding recommendations given to pet owners…
Dr. Bushby states in Today’s Veterinary Practice that a study by IPSOS reaffirmed in 2009 and 2011 that the timeline for altering cats confused pet owners. In 2016, the VTF made an effort to answer this friction andreviewed feline sterilization literature. They concluded that the optimal age for spay/neuter is 5 months. The AVMA reached the same conclusion in 2013. These are informed recommendations, but they still reflect veterinary opinions.
Categories of Health
Some data could be grouped into 5 categories of health risks and benefits.
- Neoplasia
- Immune System
- Skeletal System
- Animal Behavior
- Obesity
Even when we dig into these categories and explore research, the data rarely answers the question of the best time to alter a cat. Instead, it offers a range of risks and benefits.
Neoplasia
Data shows early neutering (before 5 months) reduces mammary cancer risk in female cats. The risk drops by 91% if spayed before the first heat, 86% before the second, and 11% before the third. No reduction is seen after the third heat cycle. Many vets repeat these findings, but the research is often inaccessible. However, the consensus is that early spaying statistically reduces mammary cancer risk.
Perhaps the most comprehensive article on all these topics tries to bring together 150 studies. It concludes that early spaying is beneficial for mammary cancer prevention. However, it also states that the evidence is not strong enough to make a fully informed choice.
Immune System
Early neutering reduces the risk of Feline Immunodeficiency Virus (FIV) and Feline Leukemia Virus (FeLV) in males. The risk of FIV decreases by 62%, and FeLV risk is reduced threefold if neutered before 5 months. More on this here.
Skeletal System
Early neutering can increase the risk of skeletal issues in males. Hip dysplasia risk increases by 17%, patellar luxation by 5%, and cranial cruciate ligament rupture by 4%. More data is available here and here.
Animal Behavior
Early neutering can lead to behavioral issues, including a 3% increase in urine spraying, a 2% rise in aggression, and a 1% increase in inappropriate elimination. More on this here.
This 1996 study found no significant behavior differences between altering before or after puberty.
A 2019 study found neutering reduced aggression and urine marking while maintaining social harmony within cat groups. However, no strong evidence links the age of altering with behavior outcomes.
Obesity
Early neutering increases the risk of obesity by 1%. Weight gain after altering is a common concern, but no specific studies suggest the timing of the procedure impacts obesity significantly. More on fat cats here.
Soft Conclusion
Data shows little chance of making a fully informed choice. The best time to alter your cat seems to be between 14 weeks and 5 months, the most studied period with minimal negative outcomes. Perhaps leaning towards five months is best but there is limited data to confirm it.
For further details, refer to the Veterinary Task Force on Feline Sterilization Recommendations.
We will attempt to update this information as more data becomes available.
| Topic | Data Summary | Source |
|---|---|---|
| Best Time to Alter | Optimal window for spaying/neutering is between 14 weeks and 5 months, as recommended by AVMA and VTF. | AVMA, FelineFixByFive |
| Neoplasia | Early spaying reduces mammary cancer risk: 91% before first heat, 86% before second heat, 11% before third, and 0% after the third heat cycle. | ResearchGate |
| Immune System | Early neutering reduces FIV risk by 62% and FeLV risk threefold when neutered before 5 months. | Merck Vet Manual |
| Skeletal System | Early neutering increases the risk of various skeletal issues: hip dysplasia by 17%, patellar luxation by 5%, and cranial cruciate ligament rupture by 4%. | MSD Vet Manual, Merck Vet Manual |
| Behavioral Problems | Early neutering increases urine spraying by 3%, aggression by 2%, and inappropriate elimination by 1%. | Merck Vet Manual |
| Obesity | Early neutering increases the risk of obesity by 1%. | AVMA Journal |
| General Conclusion | Data shows mixed results on the best age for altering cats, with risks and benefits present regardless of timing. | NIH Study |