My female mother chihuahua just had a litter with just one pup. She has been carrying and moving it by its tail. I just noticed today that a part of the tail has now called off where it was badly scabbed. It has hair about 1/2 way down then it just has a little stub of what I think is cartilage that has no hair and now the whole tail is only about 2 or a little more inches long will his tail and hair grow back or will it be a stub now that it broke off?