This chick just hatched overnight & when I went to take him from the incubator to the brooder I noticed all these tiny grey black spots on his feather/fluff shafts. They are not in his face or underbelly. His mother was a blue orpingtons & father a white true Amerucanas. Anyone see this before or know what it is? He is big (so was his egg, mother is 3-4 yrs old) and hatch all on his own, no problems.