Sorry for the delay, I finally found my academic evaluation form from last year. So cumulative GPA is 20 points of your academic score (which is 40 points total). A 3.0 GPA is a 0, a 4.0 is a 20. They take your GPA - 3.00 and then multiply it by 20 to get that score. Your last 3 semesters' GPA is 10 points, again they take that GPA minus 3.0 and multiply it by 10. Average undergraduate course load is 6 points. 13 hours is 0 points, 18 is 6 points. They take your average course load x 1.2 and then subtract 15.6. For example I had an average undergrad course load of 16.13 hours, so my score was 3.76 points. Then the last 4 points is your GRE score, 3 points based on the quantitative and verbal sections and 1 point based on the analytical. For quant and verbal, add your scores, subtract 285, divide that by 18.33 and that's your score. For analytical, it's your score minus 1.5 divided by 4.5.
Then your non-academic score is 60 points, 20 of which is your "overall impression" score. The other 40 are broken down as follows: 5 points for motivation/concepts of profession, 2.5 points for companion animal experience, 2.5 points for equine experience, 2.5 points for food animal experience, 2.5 points for other animal experience, 2.5 points for biomed/public health/research experience, 5 points for communication skills, 5 points for extracurricular activities, 5 points for leadership/initiative, 5 points for work experience, and 5 points for unique life experiences. In each category you're scored out of 10, and then that is converted to the number of points.
I hope that's helpful and not too confusing! Last year for accepted IS applicants the average total academic score was 24.09 and non-academic 40.51. I was told in my file review last year that their minimum cutoff for IS acceptances was 55 total points, but that varies from year to year. I don't have the average numbers for OOS, but Kathy in admissions may be able to give you more info if you shoot her an email. Also note that this information is from last year, I don't know if they changed anything this year or plan to make changes for next year.