The SPCA offered to let me take home the medicine, so I could do it myself, when I wouldn’t let them put down a feral (Scooter Cats of OG let's see those kitty pics - #928 by herojuana.tom ) I was taking care of during his final days, so it may be an option.
I couldn’t do it though, its not in my nature, I would be devastated if I had to do it myself