This is rarely caused by gravidity. It sounds like she has an intestinal infection. These are treated with antibiotics and parasitides. In Ecuador, without a prescription, you can buy those medicines for cattle at farm supply stores.
I don't know the name of the antibiotic to look for (try to find the equivalent of Baytril), but the parasitide is Panacur, very commonly used throughout the world. Try Panacur first. You will have to calculate the dosage, because cattle get a very large dose. I could help you with that. She needs two or three courses of Panacur, with one-week rests between courses. Sorry I don't know more.
My Internet access is very sporadic. I dearly wish I could stay in constant contact with this group. I will try to look for your response.