HesterF is right madchickenlady - it's the bill colour that's the first give-away, more of a pinky-grey. There are a lot of people out there who think they have Aylesburys and it's never fun having to point out that a yellow/orange beak means it's not what they think. When they are full grown they should have a very well developed keel, other breeds/crosses have a more upright walk too. We've hatched some this year and I have to say they are an absolute delight... though the latest thinks he/she is human as we are having to hand rear!! ('Fun' pic attached, all being well!)