about this freezer burn that was said earlier in this thread:

When does freezer burn occur? I have rodents that I've had for around a month in the freezer, should I be watching for it?

How can I prevent it? and how can I tell if they start to get freezer burn?

And does it ruin the rodent for a healthy meal for the snake?

And this is the last question I promise:
With Big cheese using this vaccum packaging, that is great for only the shipping to your house correct, unless you have your own device which you can vaccum shut the bags each time you open them. So my question is how good is this vaccuming technique?