Long haired dogs and even things like labradors, also some cats. My allergy has lessened now as have gotten older but whilst at college age it was bad and since my dad never let us have dogs and cats i never knew until i was looking after them in college.
When i did work experience at a local vets i had bad reactions and then i had a traumatic time as well. I do not think the vet was very good at all and he did put me off. I spent my whole 2 weeks crying or sneezing.