We have 3 big dogs who have taken to laying on the spa cover. They have bent it in so much it is in the water. One is a puppy and has chewed it up also. We have thrown it away and are looking for something to replace it with that they wont ruin. We have thought about getting marine grade plywood and making a cover out of that... any other ideas? The spa is built into the deck so you just walk up to it and step in. Thanks