[Gharrissc]

I've heard of several people say that Service Dogs shouldn't go to a home with another dog because it serves as distraction to them. We had a guy ask us to help him place his two dogs because the organization that he was getting his Service Dog from said that he would have to place his pet dogs first. I wanted to know if dogs can differentiate between work mode and non work mode,why can't they do this while living with another dog?
I have a friend who trains Service Dogs and he will not place his dogs with people who have another dog, unless they are willing to rehome their current dog.