2 of my 15 chickens have lumps on their feet. Anyone know why? It's both of my black and white stripy (I'm having a brain fart as to their breed right now) birds and one of my Columbia Rocks has a bit of red between her toes. Is the red because of the recent snow fall? I added extra hay and shavings to the coop and run to give them some space to keep their feet off the snow. My other 12 chickens legs look normal.