If you do it direct through optigen i.e., not via a 20/20 clinic, how does it work? Do they send you anything, like Antagene do, to get the bloods done in, or do you just print out the paperwork and get the tube from your vet when you get the blood drawn? I am having one of mine done next week, while the discounts on, but I've only ever done it by 20/20 clinic before, so a bit unsure as to the exact method.