Gates is co-author, with Chuck Collins, of the book Wealth and Our Commonwealth: Why America Should Tax Accumulated Fortunes, a defense of the policies promoted by the estate tax. He married Mary Maxwell Gates, whom he met at UW, and who died in 1994. They had three children: Kristianne, Bill, and Libby.
Symptoms of heartworm disease may include loss of appetite, lethargy, exercise intolerance, weight loss, fever, dyspnea (difficult, labored breathing, shortness of breath), coughing, weakness, dull dry coat, and hemorrhage. There are no symptoms at all until the disease is advanced.
Some dogs may display lethargy; if the infection is more severe, the dog will show symptoms such as: 1  Dry coughing, especially after exercising; in advanced cases of heartworms, the dog will cough up blood. 2  Tiredness; the dog will spend more hours sleeping and sitting. 3  Early exhaustion after physical exercise. 4  Vomiting.