Haha I meant third one. I just edited my post lol. I should start using their names to help with confusion. The third one, Dickie, is the one I'm positive is mallard/runner, and he is the lightest. The pekin/mallard male Frankenduck is by far the heaviest. He is huuuuge. The pekin/mallard female Snowflake is short but heavy and very round. The last one that I'm not sure about, Mr. Duckie, is smaller than the pekin/mallard male, but is putting on more weight. To me he looks like he's shaped just like a mallard, but with a gray head lol. This is Mr. Duckie (and Frankenduck) when they were adolescents. Duckie had feathers like a mallard pattern, but instead of black and brown, they were gray and brown.