In regards to the dogs nails I have a chihuahua whose nails grow at the speed of bloody light and cant be cut that often as the blood line inside doesnt seem to be going down any further. She was a rescue and her nails were really long when we got her. In all honesty having hers from puppies she shouldnt have had this problem with them. But after letting them grow so long the blood line in them will be much longer than it should be, I just hope she takes them to get the cut properly as if you cut the blood line it causes them a lot of pain.