10-1 water/hydrogen peroxide mix. wet 'em down, let it stand 5 -10 minutes, rinse. Actually works!
I’ve always heard that a tomato juice rinse will do the trick.
Yes we heard of that, not sure about the ratio though. And thought of that on the next day but I was concerned about the peroxide bleaching the dogs coat (she's a Yellow Lab). And our dog got it straight in her face, and head, then on her body.
So the first night the wife used tomato juice, then a Vinegar-water mix, finally with a straight vinegar wipe on her muzzle.
(I was asleep when they walked the dog and this first happenned)