I heard barking once on the 6th floor of Hard Rock. I thought that was strange. It was muffled and wouldn't keep anyone awake or anything. I have never heard a peep (or bark) at PBH or RPR.
We have had many stays and not once been disturbed by barking. We did see the pets (sometimes) just never heard them.
Candice30,
My son has allergies and asthma and they have always been wonderful about pet free rooms for us. He's never had a problem. Just make sure its noted and mention it again at check-in.