Yes,you have to appear for separate exams for admission to Bachelor's course in Veterinary Science.The most common exam is AIPVT.

Eligibility criteria:

To be eligible for the Bachelor's in Veterinary Science and Animal Husbandry course, a candidate should have pass the 12th(+2) examination with Physics, Chemistry and Biology.Admission to most veterinary colleges is done on the basis of marks obtained in the entrance exam conducted by the university concerned.