Hello, last year I used an Mendota Skid Plate on my female lab. She is a big girl with a deep sternum. Bought her an X large but it still chaffs her on the inside of one of her legs. Straps are maxed out, my wife has modified the opening but it still fits too tight. I see Filson makes a skid plate style just wondering how that works on big dogs or is there another brand I could be looking at? The Mendota works fine on our smaller lab. Thanks, Richard