*shrug* My dog never got the memo.
None of my dogs got that memo either. I often left the rotty, the lab/whippet/pitty mix, and the olde English bulldogge alone with the cats in the house, with nary a problem. The peke/pom/sheltie mix and the teacup chihuahua are still missing my last cat.
Generalized statements like the one earlier are more often wrong than right.