Congrats on the interview!! Be ready to explain why/how you will handle living in a strange country without the people you care about. Make sure to know EVERYTHING you put on your apps/essays/transcripts, the good and the bad. Have some reasons why you want to go to Ross. Know why you want to be a vet and some current issues in the field. My interview lasted one hour and 20 minutes, a lot longer than their standard interview (per my interviewer), but it was because it was very conversational, we ended up talking about a whole plethora of things that you can't really prepare for. Other than those tips, just bring a bottle of water and smile!! My interviewer was INCREDIBLY nice. It really was a conversation, moreso than any of my other four interviews. Good luck!! Take deep breaths and nail it!!