My mom got some new ducks about a week ago and they seem happy and healthy. They are not tame but I caught one of them today and noticed that she(?) has several holes in the webbed part of her foot. She walks fine and they don't seem painful but I'm wondering if this is normal? Some of the holes are about as wide/round as a pencil, some are much much smaller. I didn't have a camera nearby unfortunately and didn't want to stress her out by holding her too long.