QNS, I'd consider using borax when soaking...it would help to neutralize the urine odor...detergents only make the odors worse. I would consider dissolving the borax in hot water first, then cool down and add it to your cold water soak. Woolite may be a good choice of cleaner. After the final rinse roll the quilt in a cotton blanket to squeeze out excess water...I remember doing this to wool sweaters back in the day.