I can't let my dog out to use the front yard because we just had a rabid foaming chihuahua run through it dripping saliva everywhere. Some kids were close behind and nervously picked up the dog, so that's all good now. But how long is that foam dangerous out there? I vinegarized the visible spots to kill the germs in them but I know I don't see all of the foam and my dog will immediately sniff the heck out of it and inhale it if he gets out there. What can I do? How long do I quarantine the yard from him?