I puppysat one time and ended up with a lot of unwanted "guests". I dipped the pup. I bug bombed the house more than once. Finally a friend told me to sprinkle salt on the carpeting and under furniture cushions let it sit a day or so then vacuum ..repeat if necessary. No more fleas! Not saying the hotel isn't to blame but I live in Florida, have pest control, have indoor cats and use advantage. Every once in a while a flea appears. Those buggers come in no matter what!