OREGANO, is effective against many bacteria, fungus, salmonella's, and E. coli. It helps in digestion, kills some staphylococcus and streptococcus species, and generally boosts the immune system. Oregano, like other antibiotics can be over used. It should be followed up by probiotics.
I use a provided dropper and add 12-15 drops to a shot glass of oil or Red Cell vitamins, and mix into feed 2-3 times a week. However, don't rely on my measurements - Do your own research on this powerful NATURAL ANTIBIOTIC.
Purchase a health book or video today, and eliminated the guess work! Vet's for Fanciers, Edited by Dr. Zsolt Talaber would be a good start.