Dave,
I have plenty of scrap horse stall mat material.  Send me your address.  

TIP...trim it with a knife as close to size & thickness as possible.  Use a coarse 36 grit belt.  Be careful cause the belt on rubber wants to grab the knife out of your hand...tippit

Great Idea's Jeff.

After the way my horse was acting yesterday, I may take his mat away for punishment.  The fly fishing knife is a great idea but how does it reel in the fish once it hooks them   :rolleyes: