My 9 months old barred bantam cochin, have a small area that is yellow colored stuff on the underside of both of her foot. Before I tried to clean it, the color was black which might be a mixture of dirt and poop. It is located near the middle of both of her foot, and the color on the area around it is slightly pinkish white. It looks like there is an injury in there, since the yellow colored stuff, look exactly like the one found on my other chicken that have an injury on the underside of it's toes few days after injury. It happened about 2 months ago, but it was not red and swollen. Is it granulation tissue, and is it normal? I don't feel anything hard in it, and I didn't see any pus coming out?