He could be a vienna-marked Nethie. I think the vienna marking comes up in the nethie breed as a blue eye carrier. One dose (heterozygous) gives you dutch-like markings, two doses of the gene (homozygous) gives you blue eyes. At least that's how I understand it. From the way you describe him, it sounds like he's not overweight. He could just be a nethie that doesn't have the dwarfing gene. I think that the dwarfing gene is a dominant, because two doses of the dwarf gene gives you a peanut, and one dose gives you a small bunny. So you'd have to mate two heterozygous dwarves to get dwarf babies. say A = dwarf, dominant. a=big, recessive. Cross Aa with Aa to get babies, 1/4 will be AA, 1/2 will be Aa, 1/4 will be aa. AA is lethal (peanuts), Aa is a typical nethie, and aa is a big guy. Hope that made sense. I don't know if that's true, it's just what I gather from what I hear breeders say. Somebody like Polly who raises nethies would know better.