Hello.
For Bvsc course you can consider average fee around 50k to 2 lakh in Tamilnadu or Karnataka, remember this is an average idea it may vary according to the university or college you select, kindly go with the provided link to see all the colleges which offers bvsc course in Karnataka:
https://medicine.careers360.com/colleges/list-of-bvsc-colleges-in-karnataka
For Tamilnadu you can refer below link:
https://medicine.careers360.com/colleges/list-of-bvsc-in-veterinary-science-colleges-in-tamil-nadu
Best of luck.