Drool Damage

The floors didn't look this bad when we uncovered them, but they did look worn. We knew we would need to refinish them, but we couldn't justify any cosmetic, non-code-specific updates at the time it would have been easiest to do so (before we had moved in a lot of stuff). I didn't expect that last layer of finish to diminish so quickly. I'm thinking this is largely due to dog drool damage. I know - now you never want to come over, right?