Deworming
Although I generally feed frozen/thawed prey, my snakes will occasionally get a live prey item or one that has been freshly killed but not frozen. Because of this, I deworm my snakes once a year just in case my rodent colony is harboring parasites. (It's much easier to deworm my snakes than to try and deworm a rodent colony.) And even though many will say that freezing prey for 3 months kills all parasites, there really isn't any solid proof of this. And if it IS true, can you guarantee that EVERY frozen rodent you have fed has been frozen for 3 months?