I was playing with Sadie the other day and noticed that her two front legs have well developed knees. I am thinking it is because corgi's are so long and they need the extra support; or atleast I am hoping Sadie isn't the only one! Take a look at your little ones, you can tell the most when she is standing up and you're in front of her. I will try and snap a picture of them, but she was suspicious of me last night when I tried.