What pattern is suggested by many breeders to be rarer than the solid Red color itself in practical breeding contexts?

Answer

The Full Coat (Blanket type)

Many breeders suggest that the Full Coat pattern, which occurs in Black and Tan or Liver and Tan types, is rarer than the solid Red color because it requires inheriting the highly recessive *A*t allele.

What pattern is suggested by many breeders to be rarer than the solid Red color itself in practical breeding contexts?
colorbreedBloodhound