I plan on buying in bulk, possibly from big cheese rodent factory but I realized that they do not vacuum seal the packages individually. Is there an efficient method as to storing them for a quick thawing process and to minimize the amount of times the rats get exposed to outside air? I'd like to keep them from smelling like the fridge as well (if that matters for my bp). It seems like most places ship them in bulk in 1 package. I'm willing to pay extra for the individually vacuum sealed ones if there is a vendor that does it. Any suggestions?