I had them in the freezer section of my mini fridge near the front so it wasn't as cold as a kitchen fridge freezer... one of the mice in the packet (the one I fed her) was frozen all the way through but all the rest didn't seem completely frozen solid; ie, they gave way when I poked them in the tummy but other parts of them seemed frozen. Either way they were in the freezer the whole time and I only got them last week... do you think it's safe to feed them to my snake?