Equipment: -Oven light in your existing oven (inexpensive and effective) - Yogurt Maker or a slow cooker, or a cooler and 1 quart mason jar, or a food dehydrator and a 1 quart mason jar. NOTES: Raw milk yogurt has a tendency to be runny. This is normal and is caused by the action of temperature-sensitive enzymes present in raw milk that would otherwise be killed by heat. If liquid-like consistency is unappealing to you, consider substituting part of the milk for fresh cream, or straining the yogurt through a fine butter muslin available from most cheese-making suppliers. Furthermore, due the natural presence of beneficial bacteria in raw milk which are likely to eventually out-populate the strains in your desired starter, your yogurt starter will degrade over time. For this reason, it is necessary to maintain a pure seed starter, or to be mindful of the desired quality of your yogurt and to purchase new starters to periodically refresh your old starter. This is generally not necessary when making yogurt from boiled milk.