I'm a RVT (registered vet tech, also known as a CVT OR LVT) and I agree with the above. It's not for the faint of hearts and you need more then just a love for animals to do the job. At its worst it's disgusting and sad, but you also get the best side of it like a new adoption or seeing a very sick animal get better and go home. Your always beat up, bruised or scratched, and sore from fighting with or lifting a pet, and the pay is pretty crappy. I wouldn't trade it for any other job though. I love my job.
Burn out rate in any animal field is high, it's a exhausting job. So I would caution that if she really enjoys animals there is a chance she could burn out and loose empathy for them if she just can't handle it. I still adore animals but there are times I get home from work and I just have to have a few minutes of animal free destressing time before I can give my guys the love they need. Other times I need to pull my girls close to me in order to destress.
But Kennel work may be good for her, but no matter what animal job she would choose there is always going to be body fluids coming out at some point if she is squeamish about those.