I personally didn't administer an injection. It was done by a vet. I'm not sure what the AI was, as different ones have been used, but it's basically an overdose of anesthetic.
I can hear the cash register, going kerching, so I'll elaborate.
I have never dealt with feral cats, for free. My pest management solutions cost the client, or they kept whatever the problem species was.
Taking Tiddles to the vets, was factored into the price, as I believe that this is one of those sensitive jobs that requires an extra level of care when dealing with the customer, and any potential failing i