This is a very well made harness. Strong and has double stitching. The problem we're having, however, is that it's not fitting our furry baby properly. We ordered the extra large based on his measurements, yet the strap that goes over his back side (from thigh to thigh), keeps slipping down to his tail. When he lays down, the leg straps want to fall off. We've tried readjusting in everyway imaginable but we just can't quite get it there. Even if we tighten the strap that connects the thigh harne...