When I looked at this lutino I've notice something strange. It is as if I can see markings on the wings - the edges of the wings are a brighter yellow than the rest of the feather. All my other lutinos I had in the past was of an even colour. This is a baby bred from a greygreen/blue ino **** and a greygreen TCB/blue hen. Please explain - or is it normal? Hope picture is good enough to see the markings.