Even if there was a more streamlined way to communicate, it's possible the dogs may react differently in a different environment.
However, I recently realized something that gives me more insight into the dog's Rover history...
As soon as you get a message about a pet (before booking), if you click on the small box with pet's photo or blank icon, it shows another window with the basic information about the pet and pictures that were taken and sent through Rover by ALL the pet's previous sitters with the Sitter's first name,last initial and Date taken. That alone paints a picture (i.e. repeat versus constantly changing sitters, frequency) and provides enough information that you could then contact sitters where there may be overlap and start a conversation.
To Answer your question What do you mean by bad dogs? Are they aggressive? Or what do you define as "Bad Dogs"? @Walt G.