I haven’t tried them, but the reviews on the Chris Christensen’s Black on Black Shampoo and Black Mask are pretty good.
That's a thought that's crossed my mind too, and yes, it's plausible that the black could have masked phantom genes (the eyebrows remind me of this), but it's just too early for me to tell.Bella’s color change sounds very interesting. Is there any chance that she has phantom markings/pattern, as the color changes sound like they are kind of appearing in the phantom pattern...
Notice that both say phantoms must have a ky/ky genotype. She has kB/ky:at/at genes:
This dog carries two copies of at which results in tan points and can also present as a black and tan or tricolor coat color. However, this dog's coat color is also dependent on the E, K, and B genes. The tan point coat color is only expressed if the dog is also E/E or E/e at the E locus and ky/ky at the K locus. This dog will pass on at to 100% of its offspring. https://www.pawprintgenetics.com/products/panels/details/140/?breed=18
"Phantom" is the term used in smaller poodles to describe the black-and-tan pattern common in many other breeds. Phantom poodles must have a ky/ky genotype plus an E or EM, and also be at/at. This particular dog has an EM allele based on the back on its muzzle. http://homepage.usask.ca/~schmutz/poodle.html
My guess is the wild card is the mystery fading gene that causes some black poodles to get white hairs or turn bluish or steel grey-black over time. I'm wondering if this, instead, paves the way for her hidden tan points to be expressed.KB/ky
KB Locus (DNA marker – G23del)
The is responsible for allowing solid colors to be expressed in the dominant form of the allele (KB). In it’s homozygous recessive form (ky) allows the agouti (a, ay, at loci) colors to be expressed. KBky – 1 copy of the dominant allele and 1 copy of the wild type.
This dog carries one copy of KB and one copy of ky which prevents expression of the agouti gene (A locus) and allows for solid eumelanin (black pigment) production in pigmented areas of the dog. However, this dog’s coat color is also dependent on its genotypes at the E and B genes. This dog will pass on KB to 50% of its offspring and ky to 50% of its offspring. Interpretation: No agouti expression allowed (Carrier).