Stuttgart makes neutering and registration compulsory for outdoor cats: what changes and why it's needed

What the city council decided

On 22 October Stuttgart city council adopted a cat protection ordinance (Katzenschutzverordnung). It comes into force on 1 March 2027. From that day, all cats that go outdoors freely must be neutered, microchipped and registered.

The city itself advises owners not to wait until March but to get everything done in advance. Animal welfare groups have welcomed the decision: on 23 October PETA called it an important step and urged the same rule for the whole state of Baden-Württemberg.

Who it affects

The ordinance applies to cats that go out unsupervised: they leave home when they like and may meet other cats. Indoor-only cats are not affected. But the city is appealing to all owners whose cats spend even some time outside: these animals too are better off neutered and registered.

For owners of indoor-only cats, the ordinance changes nothing. But vets advise microchipping these cats too: they quite often fall from windows or slip out of the door, and without a microchip it's almost impossible to trace the owner.

Exemptions are granted by the city's public order office — for example, for breeding cats. In other German cities with similar ordinances, breeders don't have to neuter their cats, but the requirement to microchip and register them remains.

What owners need to do

1. Neutering. This is done by a vet. Cats usually have to be neutered before they start going out on their own — in Wiesbaden, for example, from five months of age. Discuss the right age and method with your vet.
2. Microchip. This is a tiny capsule under the skin with a unique number. Microchipping takes a few seconds and is done at the vet's.
3. Registration. The microchip number must be entered on a pet register together with the owner's contact details. In Germany, the free TASSO or FINDEFIX registers are most commonly used; the public order office can confirm which registers the city accepts.

When a cat is found without an owner, city services check whether it is neutered, microchipped and registered. If not, the city can order the owner to have all of this done — up to and including neutering an unregistered animal.

Why cities are taking these measures

An unneutered stray cat has kittens several times a year, and its offspring very quickly start breeding themselves. That's how colonies form in which animals go hungry, fall ill and die young. Stuttgart points to its own data analysis: there are many stray cats in the city, they are often sick and they breed rapidly.

The city lists several aims:

• reducing the suffering and disease of stray cats;
• stopping uncontrolled breeding and reducing the number of such cats over time;
• easing the burden on the city shelter and on volunteers who catch, treat and rehome animals;
• reuniting lost cats with their owners more quickly — via their microchip and register entry;
• cutting the city's costs for housing and treating found animals.

Shelters across Germany are working at full stretch. According to the German Animal Welfare Federation, almost half the country's shelters are full or overcrowded. In summer 2026 the federation, together with four local organisations, took the federal government to court because the budget contains no money to support shelters.

Why Germany has no single law

Germany does not yet have a national law on cat neutering. The Animal Welfare Act allows federal states and cities to introduce such rules themselves, so they vary from place to place:

• in Hamburg, neutering, microchipping and registration of outdoor cats have been compulsory since 1 January 2026;
• in Schleswig-Holstein, the rule has applied statewide since 1 July 2026, with a six-month transition period;
• in Krefeld, it will come into force in May 2027.

In September 2026 the German Animal Welfare Federation, all its state branches and 775 other organisations wrote to the government asking for a single cat neutering law for the whole country.

What's changing at EU level

In August 2026 the first EU-wide regulation on the welfare and traceability of dogs and cats was published. It introduces common requirements for breeders, sellers, shelters and online platforms, and compulsory identification and registration of animals in national databases. The requirements are being phased in: for breeders and sellers from 2030, for all dog owners from 2036 and for all cat owners from 2041. Countries and cities can introduce stricter rules too — as Stuttgart has. In England, microchipping of pet cats has already been compulsory since June 2024.

What neutering and microchipping do for the cat itself

Neutering isn't only about tackling stray animals. Neutered toms and queens roam less far from home and fight less, so they are less likely to be injured or to pick up infections spread through bites and mating. Cats spayed at a young age have a lower risk of mammary tumours. And a microchip with a register entry is the best chance of getting a cat back if it gets lost or is hit by a car and taken to a vet.

For tomcats, neutering also solves an everyday problem: entire toms mark their territory with strong-smelling urine, including indoors, and call loudly for females. After neutering these habits disappear or ease noticeably in most toms — especially if the operation is done before marking becomes a habit.

What neutering and recovery involve

Neutering a tom or spaying a queen are routine operations under general anaesthetic. Beforehand, the vet examines the cat and tells you how many hours to withhold food. Toms can usually go home the same day and are back to normal within a few days. Spaying a female cat is a bigger operation because it involves the abdomen: the wound takes about 10–14 days to heal, and throughout that time the cat mustn't lick it — a cone or a post-operative body suit is used to prevent this.

In the first few days your cat needs a quiet, warm place, fresh water and rest; it's too early for jumping onto cupboards or going outside. If the wound becomes red, swollen or starts to discharge, or your cat doesn't eat for more than a day or seems lethargic, ring the practice.

After neutering, metabolism slows and appetite often increases, so neutered cats easily put on weight. Your vet can advise on adjusting the diet, and many manufacturers make food for neutered cats.

If you find a cat outdoors

Not every cat outdoors is a stray: many are simply out and about. If the cat looks well cared for, leave it alone. If it's thin, injured or clearly lost, take it to a vet or a rescue centre — they'll scan it for a microchip, usually free of charge. Using the chip number, the owner can usually be found on the register within minutes. If the cat has no microchip, report it to a local animal welfare organisation: they'll know what to do next and can arrange neutering for a stray.

What it costs

The cost of neutering and microchipping depends on the practice, the cat's sex and its health. In Germany, vets charge according to a national fee scale (GOT) that sets minimum and maximum rates, so it's best to check the exact amount with the practice in advance. Registration with TASSO and FINDEFIX is free.

Many animal welfare groups and shelters regularly run subsidised neutering campaigns for stray cats and for owners on low incomes. If the costs are a struggle, ask your local animal welfare organisation whether such a scheme is currently running.

Frequently asked questions

My cat only goes into our fenced garden. Does that count as outdoor access? The rule covers cats that go outside unsupervised and could meet other cats. If you're unsure whether it applies to you, ask the public order office — or simply have your cat neutered and registered: it's worthwhile either way.

My cat is quite old. Does it need to be neutered too? If it goes out unsupervised and isn't neutered, yes. Age and health matter for the anaesthetic, so your vet decides how and when to operate after examining the cat.

My cat already has a microchip. Do I need to do anything else? Check that the number is on a register and that your current phone number and address are recorded. A microchip without registration does little to help trace an owner.

What cat owners in Stuttgart should do now

• Book an appointment with your vet and discuss neutering if your cat isn't neutered yet.
• Check whether your cat has a microchip — any practice can scan for one.
• Register the microchip number and check that your contact details are up to date.
• If you breed cats, find out from the public order office in good time how to get an exemption.

There are more than four months to go until 1 March 2027, but practices often get busy before a deadline — so it's best not to put it off.