I learned something new when I starting working at a fabric store. A lady brought her finished quilt by the store one day to show it to the employees and how nice it turned out. Another customer came in with her dog and he cocked its leg and peed on the quilt - we all about had the vapors. The owner ran into the kitchen and grabbed a bottle of Vodka - yes, Vodka. She sprayed it down real good and told the lady to wash it in cold water and then use some nice fabric softener. She called the store and was so excited...it worked - removed all the pee and she couldn't smell anything bad at all. Now, with all that said - since your quilt has been washed and dried - this may not work. It may not work anyway, but maybe it can help in the future. Vodka is a necessity at the fabric store......Hope all works out for you.