We do not require that a letter is from a veterinarian BUT it is strongly recommended. You may find the information below at the following link (https://vetmed.iastate.edu/student/future-dvm-students/apply-to-the-coll...
“Three electronic letters of evaluation are required. Up to six electronic letters of evaluation will be accepted. All applicants are strongly encouraged to have more than the three required letters of recommendation in case one of their evaluators is unable to meet the evaluation deadline. Persons chosen to submit letters of recommendation should know the applicant well and be able to speak to their personal characteristics and attributes. Do not choose an evaluator solely on the basis of their job or position. It is preferred that the evaluators write comments (or a letter) in addition to completing the form letter of recommendation. Suggested evaluators are veterinarians, advisors, professors and employers although others are also acceptable. Evaluations should support the applicant’s experiences and should confirm their commitment, maturity, work ethic and leadership and communication skills with examples. Applicants are strongly encouraged to have a recommendation from at least one veterinarian. Evaluators cannot be related to the applicant by blood or marriage. The Admissions committee may contact references directly if further information or clarification is needed.”