We pay the vet to give our horse vaccines, but since one got a nail in her foot, I have given more horse shots than people shots in the past 10 days! ( I am a
nurse!) Our vet is great at showing me what to do. I even sedated my girl 2 nights ago to change her dressing!
I have also volunteered at a spay/neuter clinic, so have given multiple shots to cats, but all under a vet-tech's supervision.
That said, I don't give my cats vaccinations, although I do clean cuts or bites at home, and worm them. But I like having a vet check them once a year when they are due for shots. And the vets are up on what to give, etc.