The last two calves born on our place have gotten off to excellent starts and within a week they were down. The first had scours real bad and had trouble walking. The hind legs just wouldn't work and it would fall over. That calf is fine now after some vet treatment for pneumonia and scours. Today I found another calf (week after birth) unable to get up and nurse. It had scours, but not bad. I got it up and the same symptoms with the rear legs. I tubed it some electrolytes and checked it an hour later and it was laying in the same spot. It could lift it's head, but still was wobbly in the back end. Any ideas what this could be?