Witnessing awful treatment of cows, sheeps, and other animals in my pre-veterinary college program shocked me. I didn't understand their suffering until then. I tried to stay with the pre-veterinary program but dropped out after two years because I lost morale seeing what even veterinary students were expected to do to their patients. I met animal rights activists soon after I left college. Their literature was entirely consistent with my feelings. I began volunteering with them, I saw they were happy & healthy vegans, and I became vegan soon after. As with so many other humans I know, my biggest regret is not becoming vegan sooner.