Over the course of March in Sedona, the chance of a day with only rain decreases from 17% to 12%, the chance of a day with mixed snow and rain remains an essentially constant 1% throughout, and the chance of a day with only snow remains an essentially constant 0% throughout.
Testing. 1  All dogs should be tested annually for heartworm infection. 2  Dogs should be tested for heartworm if they are going to be switched from one preventive to another. 3  Puppies under seven months of age can be started on heartworm preventives without first being tested.
Assessment of Heartworm Disease. If your dog does contract heartworm disease, your veterinarian will determine the stage of the disease (severity) before suggesting a course of treatment for heartworms. There are four stages, or classes of heartworm disease. Class One is less severe and is the easiest stage to treat.ssessment of Heartworm Disease. If your dog does contract heartworm disease, your veterinarian will determine the stage of the disease (severity) before suggesting a course of treatment for heartworms. There are four stages, or classes of heartworm disease. Class One is less severe and is the easiest stage to treat.