He has a walnut comb. If McM doesn't have a walnut combed breed, then pretty much the logical choice is EE simply by the sheer popularity and numbers or it's a product of crossing or mixing either by accident or something like a 'purebred' tossed into an EE pen.
EE have no standard, so can't really say what they look like other than the majority more or less look like amers with non-standard colors. But there's absolutely nothing to rule out them being crossed or mixed with anything else or anything to rule out them having feathered legs, even.
btw, walnut is result of both rose comb and pea comb being present in the same bird so if you fancy, he could be an EE- Hamburg cross/mix.
EE have no standard, so can't really say what they look like other than the majority more or less look like amers with non-standard colors. But there's absolutely nothing to rule out them being crossed or mixed with anything else or anything to rule out them having feathered legs, even.
btw, walnut is result of both rose comb and pea comb being present in the same bird so if you fancy, he could be an EE- Hamburg cross/mix.