Read Exodus 11:7 Using Other Translations
But against any of the children of Israel shall not a dog move his tongue, against man or beast: that ye may know how that the LORD doth put a difference between the Egyptians and Israel.
But not a dog shall growl against any of the people of Israel, either man or beast, that you may know that the LORD makes a distinction between Egypt and Israel.
But among the Israelites it will be so peaceful that not even a dog will bark. Then you will know that the LORD makes a distinction between the Egyptians and the Israelites.