CASTRATED GERMAN SHEPHERD DOG - DEVELOPED 'BITCH STRIP'

Hi,

I have a (just) 5 year old German Shepherd Dog who I have had to recently castrate because of benign prostate problems,

unfortunately, he has developed what I believe is called a "bitch strip",

he is a very dark pigmented dog (black and tan) and although I know the castration was unavoidable, I am wondering if there is any way of reversing the sable strip that has occurred down his spine ?

Thanking you for your help,
Maxine (Linton)