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“Fix by Five” (months) saves lives by preventing unwanted litters.

For decades, veterinary students have been taught that six months is the minimum safe age to spay or neuter companion animals. Over the past twenty years, some veterinarians have begun to spay earlier, as early as two months/two pounds.

FIX BY FIVE MONTHS3-1The Marian’s Dream “Beat the Heat” Program advocates that the age for spaying/neutering cats be moved back by just four to six weeks. This small change would remove the risk of unwanted litters by ensuring that these “tween” kittens will not have that accidental first “whoops” litter. A study by Andrew Rowan projected that close to 90% of unwanted kittens and pups are born to mothers who would be spayed after the litter was born.

A survey by the National Council on Pet Population Study & Policy showed that nationwide about 70% of cats entering shelters are euthanized. There are areas that are much higher – cats’ chances of finding a permanent home once they enter a shelter are slim. There are far more cats than there are good homes.

To address this problem we can move the age of sterilization back one month, eliminating the possibility of litters during that delicate period between kittenhood and maturity. This simple change in timing could prevent an enormous number of litters. It has been estimated that if even 35% of cat guardians would spay/neuter before maturity, the birth rate of cats would fall enough to ensure that every cat has a chance at a good home.

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Dr. Mackie Articles

Traditional Start Date of our 4 Seasons

The Queen

“Beat the Heat” is a three-part program that serves to:
1. Engage veterinarians in meaningful dialog about early spay/neuter and increase the rate of early spay/neuter
2. Provide education and outreach to convince guardians of companion animals, especially cats, to schedule the spay/neuter for no later than 20 weeks, which will reduce euthanasias and cancer deaths
3. Inform the general public of the benefits to spaying prior to first heat by conducting a large-scale campaign

Eliminate Pre-sterilization Litters by Spaying Before the First Estrus: Making the Case to your Veterinarian.

Richard Speck, DVM




Marian’s Dream: Fix by Five

Marian’s Dream: Resources

Adopt a Pet: Spay and Neuter


Articles by Veterinarians:

Dr. W Marvin Mackie:

The Queen

Hormones are Racing

Dr. Roger Johnson

Timely Sterlization

Dr. Richard Speck:

Spay before first estrus

The case for neutering at five months of age



How to reduce unwanted litters and end shelter deaths for kitten nationwide.