I'm with Debbie on this one. If given the chance I would rather administer it at home and have kitty die in my arms wrapped up in a favourite blankie.

but....

I know I would not have the strength to carry out such a task so when the time comes, I'll be off to the vet. Besides, the girls that work at the vet's office love my cats and I'm sure they would like the opportunity to say good-bye.