Tilly, I think you and the vet did a marvellous job. When my son was small, he found a poorly bird in the garden and wanted to take it to the vet. I said "no, it's a wild animal. These things happen to them. Just keep it comfortable." He put it in a box and kept it fed until it died. I can't imagine our local vet doing what yours did as a public service, or any service apart from making money.