One dog and one cat do. One cat and one dog don't.
When we had 4 dogs and 4 cats it could be a problem as 3dogs and 3 cats thought they should sleep on our bed.
"The time will come when men such as I will look upon the murder of animals as they now look upon the murder of men." - Leonardo Da Vinci, Italian Painter, Sculptor, Architect, Musician, Engineer, and Scientist
When it comes to having a central nervous system, and the ability to feel pain, hunger, and thirst, a rat is a pig is a dog is a boy. ~Ingrid Newkirk