Well, still no response to my email. I'll let you know when I hear back from them.
It was site I found when searching for this particular fabric. From their blog, they have a lovely shop. I would hate to see this happen to their other customers, too. It if happens enough it will surely hurt their business.
The more I think about it, I think their mailing supplies are stored in a shed or something like it outside. Either that, or they have a bunch of plastic sacks all crumpled up where the buggies got in. But I would THINK they would notice all the crud...at first I thought it was mouse droppings, but when I looked closer I could see an opening on one end where something had "hatched".
I'm not usually anal about this kind of stuff..heck, bugs are everywhere..I just didn't expect it from a fabric store.
Thanks for everyone's tips. I'm gonna try them all... freezer and then a couple of days in my car. With our 100+ temps for over a month now, it shouldn't be hard to kill anything remaining!