wow, big holes. Best thing to do is to trim any damaged fur or skin off, the hole needs to be football shaped or a long slit. Pin it tight on the edge of a board, like an old stretcher. Hitch every stitch, doesn't look like you hitched any. Only stitch the edge, like the last 1/16" of it, trim any pink tissue away first. If you don't hitch every stitch and make hole football shaped it will show to any good eye.