growth

Can someone please help me identify what exactly this is? I have searched the internet high and low and for the life of me can't figure it out. So this growth is protruding out of the back leg of one of our rabbits. It started out as an open sore, then a scab, then it's as if the scab just...

My pregnant ewe has tiny red dots on her udder and skin around her udder. Our other sheep don't seem to have these dots. ALSO she has a growth that resembles a third nipple! Anyone seen anything like this?