To be neutered !!!

Mary	Can I see the new kittens ?
Isobel	Of course, they're over here with their mother in this basket.
Mary	There are five ! Aren't they tiny and so sweet ?
Isobel	Yes, they're only a few hours old and their eyes haven't opened yet.
Mary	Is this the mother cat's first litter ?
Isobel	Yes it is, and happily they all seem to be healthy.
Mary	Do you expect her to have more in the future ?
Isobel	No, we'll be taking her to the vet to be neutered as soon as she has recovered from the birth.

Explanation :

When an animal is neutered, its reproductive organs are removed.

Example : We ask the public to have their dogs neutered and keep them under close supervision.