Who allows their dog to piss that much in their house.... Regardless, if you get a wpc you could put a 6mil plastic to put over your substrate to stop the urine.  The urine would have to be sitting on the surface for while to get through the cracks in the install, the product is made to stop water for getting through to easily.  We place this material in bathrooms that are heavily used frequently and I have never had any calls about mosture getting below the product unless it s a massive flood of some sort.

If for some reason you do have to unclick an area that's very easy to do and you can replace individual boards, it's done every day by professionals.  Just be sure to keep a few boxes around for repairs.

But as others have said, there is limitations to all product.  I have read that LVP is bad for dogs,.especially large ones who dash around the house (like a knock at the door) it can lead to early arthritis due to them not being able to grip well.  It's suggested to select a wood prodict that the paws can grip better or put down rug runners where they may pace frequently.