Mix the flour, baking powder, salt, and sugar in a large bowl. In another bowl, whisk in the buttermilk and vanilla until the batter is combined.
For the chicken sausage: If raw, cook in a 400°F oven to an internal temperature of 160°F using a thermometer. If already cooked: Preheat a non-stick pan over medium heat and brown the chicken sausage slices on each side.
Heat a large non-stick griddle or skillet over medium heat, and grease lightly with non-stick spray.
Pour 1/2 cup batter into circles.
Once bubbles appear on top and the bottom is golden brown, flip the pancakes. Cook until firm and golden brown on both sides.
Top with butter and maple syrup. Serve with pears.