A paper published in January 2010 in the peer-reviewed journal Homeopathy by Camerlink et al (2010) found that the homeopathic remedy Coli 30K was highly significantly (p< 0.0001) more effective than placebo in a placebo-controlled, observer blind RCT on the treatment of diarrhoea in neo-natal pigs.
52 sows of pigs form a commercial farm who were in their last month of gestation and had never been vaccinated against E.coli were randomly assigned to either a placebo group or treatment group. This included 300 pigs. Both groups would receive either the homeopathic remedy Coli 30k or placebo twice a week in their last four weeks pre-partum.
It was found that the treatment group had significantly less E.coli diarrhoea than the placebo group (P <0.0001). Furthermore in the homeopathic treatment group the diarrhoea was less severe, there was less transmission and duration appeared shorter.
Camerlink I, Ellinger L, Bakker EJ and Lantinga EA (2010) Homeopathy as replacement to antibiotics in the case of Escherichia Coli diarrhoea in neonatal pigs, Homeopathy, Vol.99 (57-62)