I just collected a sample and I can't remember if the Vet said to refrigerate it or not, all I remember is that it couldn't be "baked" but I caught it within an hour of him dropping it so I know it's fresh. I do not however know if I should refrigerate it as he did it long after the vet closed (12 am) and I will be bringing it in tomorrow afternoon at the earliest. Let me know plox! Thanks!