This is one of those topic's that you will get lots of different answers for.
I can't say I have ever heard of having to freeze rodents for two months, or anytime at all to get rid of parasites, especially when you think that if you are breeding the rodents, then you are normally feeding them fresh, albeit they may not be alive, so you can't destroy parasites, not that they should have any!
I know what your thinking, what if i have bought the rodents from someone else and am not sure of wether they are carrying anything, well all I can say is that if you aren't breeding them and are buying from someone else, try to stick to that one breeder, for quality control, and so if probs occur, you know where they came from for sure.
Saying that, I have never had a problem with internal parasites in rodents and used to buy my rodents freshly killed and I would freeze for upto a month before feeding, but often less.
Personally,I would say that between 5-6 months is a good time to keep something in a freezer before feeding, also be careful when freezing pinkies, as they can get stuck together easily and are hard to break apart, also they can get freezer burn easily, making them messy once defrosted, best to store in a tupperware container of some sort.
Also another thing to note is defrosting, always defrost at low temps, I would say room temps, but room temps vary greatly especially this time of the year.
The reason for this is that I have had friends that have defrosted mice in a warm room, and the mice have been zapped of all there bodily fluids, and so it is like feeding cardboard to your snakes, this leads to problems when the animal is trying to digest it, and can prove fatal if alot of dehydrated rodents have been fed to an individual reptile.
Neil
. I`m thinking about freezing a dozen or so extras in case I ever have a problem with my breeding mice and rat stock.
