I'm ridiculously allergic to cat dander. Doesn't matter how well sealed the yarn has been. If said yarn has been in the same house as cats I cannot touch it...even for 10 seconds. You see, cat dander travels in the air like microscopic dust particles. A forced-air heating system can propel the dander to every corner, crack and crevice of a home.
A friend had kindly given me several balls of nice wool yarn. I moved the yarn, extremely carefully, from the bag it was in to the shipping box. There was no waving it in the air, squishing it or rubbing it. Despite my caution within 5 minutes I was digging through my bag to find my inhaler.
I tell you this in the hope that if you have pets in your home and you are generous and donate yarn to anyone...please give it with a warning. And pretty-please don't be offended if we decline your offer. It could be a matter of life and death to the person with the allergy.
And if, like me, you're allergic to things that could get into yarn or fiber be sure to ask if it's been in contact, no matter the amount of time, with your allergen.
I know you want to see some knitting...
another Bear Cowl