I don't know why people are waiting for the actual thanksgiving day to put any backup plans they have in motion, be it applying to DO or something else. Sure, the saying is that if you don't get IIs by thanksgiving, then bad things might happen, but in reality, there's very little difference between one week before thanksgiving and 1 day after thanksgiving. Med schools are not going to suddenly decide to give out a bunch of IIs on the thanksgiving day. Therefore, it is in your best interest to start doing your backup plans as soon as possible, like today. So if you are planning to apply to DO, apply now! Yes there's a pretty big fee and time drain associated with that and you want to avoid it, but ask yourself this: even if you are lucky and manage to get another interview before thanksgiving, will you feel absolutely confident in your chance of admission?? Trust me when I say that you will not feel comfortable until you have an offer in your hands. So start doing your plans, now. Not much is likely to change between now and thanksgiving, and you should do whatever it takes to ensure that you don't have to reapply.
I personally applied to DO in early September, when I had two MD interviews. I didn't care for the thanksgiving rule because it is far from a perfect prediction. And I need as much assurance as possible, so I applied to DO. I felt like it is much better to have to decline my DO interviews and waste the application fee than to face the possibility of reapplying. So far, I still only have 2 MD interviews, but also 3 DO interviews coming up. I am extremely happy with my decision to apply to DO as early as I could, and I urge you to do the same. Don't try to comfort yourself into procrastination by telling yourself it's not thanksgiving yet. So what if it's not thanksgiving yet? What's the worst that can happen if you applied to DO now? What's the worst that can happen if you applied to DO too late?
