Heidi seems to have an extra full set of "claws" for lack of any other word to describe them. They are growing out of the ends of her toe pads and curl up toward her normal claws. They look like they are skin like what is on the toe pads, but they are hard. I've never seen anything like it neither has my mother. We have both had cats all our lives. Is this an odd deformity? Is it something that is common for the Manx breed?

Same pic without the circles.