Lots of people don't like pets. Some people just don't like them, and some have a positive fear of them.
Remove as many traces of your pets as possible.
Get the dog out on a walk whilst people come and view.
Hide pet food dishes. Keep them in a sensible place if you have to have them out.
I've heard recently about someone viewing a house who was horrified to find pet dishes upstairs. It's not that horrific unless there are rotting bowls of cat food, but I spose if you don't like pets you'd fine them a bit repulsive!
So keep the pets out of the way!