Why neutering matters for cat welfare
The UK has an estimated 10.8 million owned cats and a significant feral population. Cats Protection estimates that a single unneutered female cat and her offspring can produce up to 20,000 kittens in five years under ideal conditions. While this figure represents maximum theoretical reproduction, it illustrates why unchecked breeding creates irresolvable welfare problems: more cats than can be rehomed, shelters at capacity, and rising euthanasia in some regions.
At the individual level, neutering has well-documented health benefits for both sexes — covered in detail in the FAQ below. It also prevents the welfare costs of repeated pregnancy: the physical toll of multiple litters, the risk of complications, and the difficulty of finding homes for each kitten.
Neutering in the UK: the current picture
Cats Protection estimates that approximately 1.5 million cats in the UK are unneutered. Barriers include cost, lack of information about timing and process, and in some communities, cultural preferences for allowing at least one litter. The Cats Protection neutering voucher scheme provides subsidised neutering for qualifying owners and has processed over 2 million vouchers since its launch.
The right age to neuter
The traditional neutering age was 6 months, coinciding with the end of the primary kitten vaccination course. Evidence now supports early neutering from 4 months with no welfare disadvantage. Cats Protection, the RSPCA, and International Cat Care all support 4-month neutering as the standard recommendation for owned pet cats.
A female cat can become pregnant as early as 4 months if she has not been spayed — meaning waiting until 6 months carries a real risk of unplanned pregnancy. Discuss timing with your vet at the final kitten vaccination appointment — see our cat vaccinations guide for what that appointment covers.
Post-neutering care
Neutering reduces metabolic rate by approximately 25–30%. Cats that were eating correctly before neutering will gain weight on the same food if intake is not reduced. Adjust portions down immediately after neutering, or switch to a neutered-cat formula. Our how much to feed guide includes the neutered adult multiplier, and our feeding calculator lets you check whether current intake is appropriate.
How to get involved in February. Share neutering information on social media using the campaign hashtag. Donate to Cats Protection's neutering fund — it directly subsidises neutering for owners who cannot afford full cost. If your own cat is not yet neutered, use the month as the prompt to book the appointment.