My ds got his first calf on Thursday. He had noticed that his poop has been kind of runny. Looser than it should be. He went out today to feed it (bottle) and told me that there is some blood in the poop now. The calf is about 2 weeks old and was getting fed whole fresh milk on the farm that he came from. We are feeding Purina Milk Replacer. Do you know what this may be coming from or what I should do? Thanks.