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.
The most common clinical signs of heartworm infection include: intermittent vomiting (sometimes of blood as well as of food); diarrhea; rapid and difficult breathing, coughing and gagging, all of which may be confused with feline asthma or some other bronchial disease; loss of appetite; lethargy and weight loss.