Thank you for your reply. Would it be better if I simply do not include the DO letter? Like would it hinder my application in any way if I did not include it? The DO schools I am applying to do no require it. I do not want to take any risks, and if this would be risky then I'd rather just not get the letter. I already have 2 rec letters from science profs, 1 from a MD, and a committee letter.