I would think these would be Bend Or Spots. They may get larger and/or more of them as he gets older. I have a full sized appy who was born solid black with only two parenthesis of white around her hoo ha. As she got older she got more and more white and now looks like a varnish with small white bird catcher spots all over here and there and also bend or spots that are darker than the majority of her body color. But I'm just guessing as i dont really know appy patterns very well...
Who know maybe she is just a normal version of an appy and I have just never seen one like her before. I think Diane would know better if these are some type of appy spot or not.