And second of all, guinea fowl are such lean birds that you're not going to get much rendered fat anyhow. Most of the time you'll have to add fat in the form of bacon or something when roasting. So question falls entirely into the category of theoretical.
Driving distance from Fredericktown, MO to Saint Louis, MO. The total driving distance from Fredericktown, MO to Saint Louis, MO is 89 miles or 143 kilometers. Your trip begins in Fredericktown, Missouri. It ends in Saint Louis, Missouri.
Springfield, MO is 88 miles to the southwest, and St. Louis, Mo is 133 miles to the northeast. Before I-44, the main highway was U.S. Route 66, which still exists as a scenic route through the area and passes through Devil's Elbow, St. Robert, Waynesville, Buckhorn, and Hazelgreen.