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.
Hereâs what to expect if your cat tests positive for heartworm: 1  Diagnosis. While infected dogs may have 30 or more worms in their heart and lungs, cats usually have 6 or fewerâand may have just one or two. 2  Treatment.