¾ cupsplain water-based lotionstore-bought or homemade OR recently I've been putting it in Aloe Vera gel and then putting the whole mix in a salad dressing squirt bottle and that works excellent.
30dropsPeppermint Essential Oil
30dropsTea Tree Essential Oil
30dropsEucalyptus Essential Oil
20dropsOregano Essential Oil
20dropsFrankincense Essential Oil
Instructions
Mix all of the ingredients together.
Rub all over effected quarter on udder, getting up high into the 'armpit' and covering the teat as well. Apply 2-3 times a day, continuing a day after all is okay. You'll know "all is clear" when you strain the milk and there is no little butter yellow clots anymore.
Notes
This make an approximate 2.5% dilution which is suitable for animals, as you want much smaller amount of oils for animals.