How big is he gram wise? if he's still a baby/juvie I'd be more inclined to say he was just a regular pied based on his color and pattern. Its just looks too heavy and dark in some spots for the pastel gene to be there.
No to mention the lack of the pixelation that pastel pieds seem to have and the bright color he does have on his side is probably there cause he is still young, and hasn't faded to the typical pied colors yet.
I don't know about the eye thing but his body doesn't say pastel pied to me. If its possible for plain normals to have green eyes at random I don't see what exempts pieds from that.