Go to the local pet store and ask them what to use. Myself I would try peroxide on a cotton swab...just be sure to rinse area after stain fades, and no dryer until you are confident that the stain is really gone.

We are all wondering what you did. Please give us an update.

Could you applique something over the stain?

Oxyclean is my go to cleaner. I don't wash a load without it. However, I've found not all Oxyclean is equal. The one with the yellow lid, sold on the cleaning aisle for floors, etc works perfectly on every body fluid I've thrown at it . . .the white lid box, sold on the laundry aisle, not so much.

Oxyclean pre-treatment is the best stuff I have ever used! Comes in a cylindrical package. Put the blue goo on the stain and rub it in well with the nubbies under the lid. Leave it for 2-7 days then wash. It has never dis colored anything I have used it one - red, blue, black, white, and more. Truly miraculous!