Hello Laxmi,
Hope you are doing well and good. To answer your question, Yes obviously there are chances for you to get government seat for veterinary with 400 marks. In obc category you need score 360- 400+ in 85% state quota.

The cutoff for government bvsc college for

General-450+ marks

Obc-400+ marks

Sc-280+ marks

St-280+ marks

Although getting government seat for veterinary depends upon various factors like number of students appeared in the exam, category, region, AIQ rank, state, state rank,etc.

If you need more information about the bvsc colleges in Maharashtra you can check the following link:
https://medicine.careers360.com/colleges/list-of-bvsc-colleges-in-maharashtra

according to the previous year, the cutoff of the veterinary seat in Maharashtra was around 440-450.  but every year cutoff changes according to the number of students who appeared, the level of questions, and various other factors. But in 400 marks there are comparatively low chances of getting a medical college but still, you can get it.