Yes Guano is bat poo. My husband likes the smell of burlap but I can't say I'm a fan. That being said I would think if you washed it many times in very hot water, and if there were any fibers left, one might try using it in a quilt. I hope someone tries it and let's us know how it goes. Who knows you might be on to something. I dare say many of the new feed sacks are now made of plastic type materials. Don't find much in burlap anymore.