Spaying cats Campaign

We currently feeding about 20 or more feral cats at work, it's becoming extremely expensive to feed all these cats, as well as trying to rehome them. There are more and more kittens being born and we cannot afford to keep feeding, rescuing and taking these kittens to the vet to be checked out and then trying to bottle feed and then rehome them. Any kind of assistance towards getting them spayed/neutered would be greatly appreciated, we are doing this on our own so we need any kind of assistance please. Even R10 would make a difference. Every cent counts.