The best exercise is walking, as it is the least dangerous activity that doesn't threaten the lives of unborn puppies and doesn't affect the dog's joints. (snowyswan.com)
Adult dogs rarely have any symptoms but the newborn or unborn puppies generally die. (marvistavet.com)
If the dog is pregnant at the time of larval migration, larvae can travel to the placenta and infect unborn puppies. (mypetneedsthat.com)