ChowChow.org

I have in my family 4 sibling chows, all different colors and all different personalities. The only thing they have in common is their (we call them) Mohawks down their spine. It is coarse, thick and will stand up when the dogs get spooked. My dogs are for sure pure chows. I had a chow in the past and she didn't have this and anywhere I look, it is nevery mentioned in their description of the coat, is this a normal thing for chows to have?

Perfectly normal. Those are commonly referred to as the guard hairs. Usually most noticeable as the 1st set of adult fur when they are transitioning out of puppy coat. More easily visible in lighter chows (reds, cinnamons, creams), as they are darker than the remaining puppy coat.