A bone plate dimensioned for securing the rotated cut segment of an upper tibia to a lower portion of the tibia as part of a tibial leveling osteotomy procedure for an animal, the bone plate characterized by: an elongated shaft with a top surface and bottom bone contacting shaft surface between opposing sides of the bone plate elongated shaft; shaft screw holes in the elongated shaft extending from the top surface to the bottom bone contacting shaft surface for securing the elongated shaft to the lower portion of the tibia; a head portion bent with respect to the elongated shaft and with a top surface and a bottom bone contacting head portion surface between sidewalls of the bone plate head portion; head portion screw holes in the head portion extending from the top surface to the bottom bone contacting head portion surface thereof for securing the head portion to the rotated cut segment of the upper tibia; and a transition between the elongated shaft and head portion including opposing concave sidewalls, the elongated shaft having a centerline located centrally between the opposing sides of the elongated shaft and the bent head portion having a centerline located centrally between opposing side walls of the head portion and angled with respect to the centerline of the elongated shaft at an angle of 25°-30° to dispose the elongated shaft collinear or approximately collinear with respect to the lower portion of the tibia and to fit the head portion to the rotated cut segment of the upper tibia; the head portion including two outer head portion screw holes (82a, 82c), a first outer lobe about one outer head portion screw hole and a second outer lobe about the other outer head portion screw hole, a dip between the two outer lobes (83a, 83b) at the centerline of the head portion such that the head portion has a crescent shape, and a third head portion screw hole between the two outer head portion screw holes (82a, 82c); the centerline of the elongated shaft bisecting all the shaft screw holes; and the centerline of the head portion intersecting the third head portion screw hole. an elongated shaft with a top surface and bottom bone contacting shaft surface between opposing sides of the bone plate elongated shaft; shaft screw holes in the elongated shaft extending from the top surface to the bottom bone contacting shaft surface for securing the elongated shaft to the lower portion of the tibia; a head portion bent with respect to the elongated shaft and with a top surface and a bottom bone contacting head portion surface between sidewalls of the bone plate head portion; head portion screw holes in the head portion extending from the top surface to the bottom bone contacting head portion surface thereof for securing the head portion to the rotated cut segment of the upper tibia; and a transition between the elongated shaft and head portion including opposing concave sidewalls, the elongated shaft having a centerline located centrally between the opposing sides of the elongated shaft and the bent head portion having a centerline located centrally between opposing side walls of the head portion and angled with respect to the centerline of the elongated shaft at an angle of 25°-30° to dispose the elongated shaft collinear or approximately collinear with respect to the lower portion of the tibia and to fit the head portion to the rotated cut segment of the upper tibia; the head portion including two outer head portion screw holes (82a, 82c), a first outer lobe about one outer head portion screw hole and a second outer lobe about the other outer head portion screw hole, a dip between the two outer lobes (83a, 83b) at the centerline of the head portion such that the head portion has a crescent shape, and a third head portion screw hole between the two outer head portion screw holes (82a, 82c); the centerline of the elongated shaft bisecting all the shaft screw holes; and the centerline of the head portion intersecting the third head portion screw hole.