So very sorry about your loss. This brought back horrible memories for me.
Two years ago I took 5 AN kids to our local vets to be disbudded. It was a disaster from the beginning. I was not happy with the young vet who was to do the deed.....she seemed to lack confidence. She jabbed all the kids one after the other, and they dropped on the spot. I told her I was concerned at the speed they went out, and then all hell broke loose. She yelled for another young vet, and they injected them all to bring them round .....but they did not wake up......she then grabbed 3 kids, the other vet 2 kids and rushed off to put them on oxygen . It was 20 minutes before they were all awake. The vet denied she had overdosed them, and blamed the needles ..... Went back the following week and she managed to put them under, but struggled to disbud two of them. A couple of days later, one of the female kids developed what looked like a giant hole in her head, and was really ill. Back to the vet, and more jabs, but I was terrified I would lose the kid.
Thank goodness I rang Jane (Wytsend) who said it sounded like meningitis and told me to ring the BGS vet. He was brilliant, and insisted my vet ring him, and he told her what to use. Thankfully the kid responded.
I changed vets after that, and last year explained to our new vet my concerns, and all went well with disbudding. Although this year I have not had them disbudded, due to £50 plus vat per kid.