Did you find the leg in the enclosure? Have you found the leg at all? They don't bleed blood, they bleed a clearish color substance. Just make sure you have a water bowl in there so it can stay hydrated just in case it is indeed "bleeding". As long as it can replace the fluids it's losing you should be in the clear. When it molts next molt it should have a leg in replace of the one it has now. Although it wont be as thick and robust as the others it will be about the same size. On the molt after the leg should be the same as all the other ones. Some times I wish I molted.