Please DO NOT do this. I got a room that I was sure an animal, probably dog, had been in. The room smelled terrible, primarily like wet dog, and something the dog may have done in the room. It had been raining the day before.
This Hilton hotel does not allow pets. So the animal would have had to be sneaked in. And the usual cleaning, which did not remove the smell, was done. I refused the room and moved out as fast as possible.

There is no way to predict what a dog/animal will do to the room. I'm sure this particular room had to be done several times to make it acceptable. Not to mention if the dog "marked" the furniture. If this is the case, I can see why an extra $100 would be charged for pets.