It's a special hair dye for dogs, specifically poodles. Once I dyed them tho, it was in for almost a year, lol. The hens liked it. So with all that being said, I have never seen a true pink chicken and any lavender silkies I ever hatched, were a greyish slate color.
That's too cute. I used to groom dogs and had a special dye for then too. I have also heard that beet juice works really well too, but I've never tried it before.