I would go talk to the GSDs owner and express to them the dangers of their dog running loose and tell them if the dog is out again you will call animal control on them. If there is a leash law in your town they should come out and warn the owner, give the owner a citation, or impound the dog if the owner isn't around. Mase is a good idea too. You shouldn't have to change your route because the GSDs owner is irresponsible. Jada could do some serious damage to that dog and unfortunately it would be her fault just because she's a Pit.