When I had platinum hair colour I had some of my own problems with the whitening shampoos for humans that left a purple colour to my hair for several days. Looked like an old lady blue rinser. Scary! Did not look good but thankfully it washed out -slowly as it so happened but did eventually look more normal once gone. I shall avoid the Mane and Tail product for my beloved Paint horse unless I want a funky red and grape coloured horse. Thanks!