So I washed Dhorse for the first time today, and as he hasn't been washed in a v long time, it was overall a very satisfying process, and he looks all black and shiny.
But, his feathers are still distressingly yellow inspite of using shampoo for greys on his white stockings, leaving it on, scrubbing, rinsing, reapplying etc.
Any top tips on ways to improve matters ?