People simply shouldn't buy puppies without a breeding certificate.

People buy a cat and think, 'Oh that's a beautiful collar. I'll put that on,' but that doesn't make them a responsible pet owner.

People's financial situation has changed, and they surrender their cats all the time, because they're downsizing or moving to a property where they are not allowed to have pets.

It's the bedsit culture: people get a cat, and then, in a few months, when they move on or go travelling, they just throw the animal out. It's so discouraging.

When I was young, I preferred dogs, but when I moved into a flat when I was 18, it wasn't practical to have a dog. So I got a couple of kittens, and that was it.

Take one female cat over a seven-year period. If all the kittens survived and bred, she would be responsible for 21,000 cats - they are such prolific breeders: you can see how important it is to neuter.